Are NPI numbers public?

Yes. NPI numbers are public federal identifiers in CMS NPPES. This page shows the public NPPES facts Fonteum has for NPI 1952370173: provider name, entity type, taxonomy, practice location, enumeration date, last-updated date, and source snapshot date. It does not include patient information.

What does the NPI record show for William Stephan?

William Stephan (NPI 1952370173) appears in CMS NPPES as Family Medicine. NPPES is administrative identity data submitted to CMS by providers and organizations; this page displays the source snapshot date as date unavailable.

Does this page assign a provider score?

No derived score is assigned on this provider page. NPPES is an identity registry; when a CMS QPP MIPS value is available, Fonteum displays that public CMS value with its source, and absence of a MIPS value is not a quality signal.

Does no exclusion match amount to a clearance?

An exclusion or monitoring record is shown only when a matching public source row is present in Fonteum's loaded federal or state tables. Re-confirm any match against the issuing agency before acting; this page is not a legal or credentialing certification.

Where does the provider data come from?

The identity fields come from CMS NPPES. Additional sections appear only when a public source has a matching row, such as CMS PECOS, CMS Open Payments, Medicare Part D, CMS QPP MIPS, OIG LEIE, or state Medicaid exclusion lists. Source and date metadata appears where the response supplies it; unavailable dates are labeled.

William Stephan — NPI 1952370173: exclusion status

Name: Provider record — NPI 1952370173 (William Stephan)
Creator: Fonteum
License: https://www.usa.gov/government-works

Built on the authoritative federal record

The primary sources, named on every page.

These are the federal agencies whose public datasets Fonteum ingests and attributes — the issuing authorities, not customers or partners. Every figure on the site links back to one of them.

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Reproducible by design

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Source and date

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The platform records table row counts daily. Those observations detect local drift; they do not imply that an upstream publisher released or Fonteum ingested new data that day.

Named medical review

Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.

Read the full provenance and attestation methodology →

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William Stephan — NPI 1952370173: exclusion status — Fonteum

Cross-source identity

Sources that publish this NPI

National Provider Identifier 1952370173 appears in the source rows shown below. Sources that do not publish NPI use their own identifiers and are not treated as deterministic NPI matches. Chips show response-supplied dates when available; otherwise they are labeled date unavailable.

OPEN PAYMENTSOIG LEIE

Federal sources carrying NPI 1952370173
Federal source	Key	What it provides	Source & date
CMS Open Payments	NPI 1952370173	218 industry-payment records, 2024	Source:CMS Open PaymentsSnapshot PY2024
CMS Medicare Part D	NPI 1952370173	205 drugs prescribed, 2024	Source:CMS Part DSnapshot DY2024
OIG LEIE	NPI 1952370173	Federal exclusion-list listing	Source:OIG LEIESnapshot 2026-05-08

Industry payments

Open Payments received

Payments and transfers of value this clinician received from drug and device manufacturers, disclosed under the Physician Payments Sunshine Act. A payment is a disclosure, not a judgment.

$3,732

Total received

218

Payment records

Manufacturers

2024-12-23

Latest payment

Top categories

Largest payment categories by dollars
Nature of payment	Amount	Records
Food and Beverage	$3,692	217
Education	$40	1

Top manufacturers

Largest paying manufacturers by dollars
Manufacturer	Amount	Records
Abbvie Inc.	$575	39
Novo Nordisk Inc	$422	22
Astrazeneca Pharmaceuticals Lp	$397

Source:CMS Open PaymentsSnapshot PY2024National Open Payments analysis →

Prescribing

Medicare Part D prescribing

Prescriptions written under Medicare Part D, aggregated by drug across the program. Totals reflect claims paid, not patients treated.

11,348

Part D claims

$1,399,298

Total drug cost

205

Distinct drugs

2,820

Beneficiaries (≥)

Highest-cost drugs prescribed
Drug	Claims	Drug cost
Eliquis(Apixaban)	209	$168,411
Xarelto(Rivaroxaban)	184	$162,891
Jardiance(Empagliflozin)	94	$98,446
Ozempic(Semaglutide)	78	$89,878
Trelegy Ellipta(Fluticasone/Umeclidin/Vilanter)	103	$65,492

Beneficiary counts below 11 are suppressed by CMS — the total shown is a lower bound.

Source:CMS Medicare Part DSnapshot DY2024

Ownership & affiliations

Who owns, operates, or is affiliated with this provider

Chain membership, ownership, and operating relationships from federal records — each one backed by a government source row. Most individual clinicians have none; owners and organizations carry more.

Ownership and affiliation records
Relationship	Entity	Source
← pays	Bayer Healthcare Pharmaceuticals Inc. (NJ)	cms open payments
← pays	Novo Nordisk Inc (NJ)	cms open payments
← pays	E.R. Squibb & Sons, L.L.C. (NJ)	cms open payments
← pays	Astrazeneca Pharmaceuticals Lp (DE)	cms open payments
← pays	Abbvie Inc. (IL)	cms open payments
← pays	Paratek Pharmaceuticals, Inc. (MA)	cms open payments
← pays	Exact Sciences Corporation (WI)	cms open payments
← pays	Glaxosmithkline, Llc. (PA)	cms open payments
← pays	Insulet Corporation (MA)	cms open payments
← pays	Amgen Inc. (CA)	cms open payments
← pays	Corcept Therapeutics (CA)	cms open payments
← pays	Boehringer Ingelheim Pharmaceuticals, Inc. (CT)	cms open payments
← pays	Abbott Laboratories (IL)	cms open payments
← pays	Esperion Therapeutics, Inc. (MI)	cms open payments
← pays	Pfizer Inc. (NY)	cms open payments
← pays	Azurity Pharmaceuticals, Inc. (MA)	cms open payments
← pays	Lilly Usa, Llc (IN)	cms open payments
← pays	Takeda Pharmaceuticals U.S.A., Inc. (MA)	cms open payments
← pays	Astellas Pharma Us Inc (IL)	cms open payments
← pays	Merck Sharp & Dohme Llc (NJ)	cms open payments
← pays	Ibsa Pharma Inc. (NJ)	cms open payments
← pays	Mylan Specialty L.P. (WV)	cms open payments
← pays	Bausch Health Us, Llc (NJ)	cms open payments
← pays	Axsome Therapeutics, Inc. (NY)	cms open payments
← pays	Sumitomo Pharma America, Inc. (MA)	cms open payments
← pays	Phathom Pharmaceuticals, Inc. (NJ)	cms open payments
← pays	Salix Pharmaceuticals, A Division Of Bausch Health Us, Llc (NJ)	cms open payments

Full record card →Entity JSON

William Stephan

Public NPPES answers

Are NPI numbers public?

What does the NPI record show for William Stephan?

Does this page assign a provider score?

Does no exclusion match amount to a clearance?

Where does the provider data come from?

Sources that publish this NPI

Open Payments received

Top categories

Top manufacturers

Medicare Part D prescribing

MIPS quality score

Standing

Who owns, operates, or is affiliated with this provider

Retained versions for this record

William Stephan

Public NPPES answers

Are NPI numbers public?

What does the NPI record show for William Stephan?

Compliance posture

Does this page assign a provider score?

Does no exclusion match amount to a clearance?

Where does the provider data come from?

Sources that publish this NPI

Open Payments received

Top categories

Top manufacturers

Medicare Part D prescribing

MIPS quality score

Standing

Who owns, operates, or is affiliated with this provider

Retained versions for this record

Other providers

Context for this record