2026 NPPES data Anatomic Pathology & Clinical Pathology Physician NPI 1003837600 M.D.
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WILLIAM FITTER, M.D.

Anatomic Pathology & Clinical Pathology Physician in TULSA, Oklahoma. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
17
Medicare Part D claims · Anatomic Pathology & Clinical Pathology Physician avg: 284

What the federal data shows

WILLIAM FITTER, M.D. filed 17 Medicare Part D claims in 2023 as a Anatomic Pathology & Clinical Pathology Physician in TULSA, Oklahoma.

17
Part D claims, 2023

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

WILLIAM FITTER, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

17 0th percentile higher than 0% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board-eligible specialty (heuristic — not verified)

WILLIAM FITTER, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about WILLIAM FITTER, M.D.?

Quality data not reported

NPI registry status

Active

Issued 07/21/2006

NPI 1003837600

Primary specialty

Anatomic Pathology & Clinical Pathology Physician

Mid-sized

13,692 US NPIs in this specialty

Medicare Part D claims

17 94% vs specialty avg

2023 prescription claims

Specialty avg: 284

Specialty distribution in Oklahoma

How Anatomic Pathology & Clinical Pathology Physician compares to other specialties among Oklahoma providers

Oklahoma providers

Anatomic Pathology & Clinical Pathology Physician share within Oklahoma

1. Anatomic Pathology & Clinical Pathology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Anatomic Pathology & Clinical Pathology Physician share within Oklahoma

Specialty board-certification context

Estimated specialty board-certified rate — Anatomic Pathology & Clinical Pathology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Anatomic Pathology & Clinical Pathology Physician ABMS/AOA estimate

Est. board-certified rate (Anatomic Pathology & Clinical Pathology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Anatomic Pathology & Clinical Pathology Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

WILLIAM FITTER, M.D. appears in the CMS NPPES registry as a Anatomic Pathology & Clinical Pathology Physician provider holding M.D. credentials at 1923 S UTICA AVE, TULSA, OK, 74104, with a listed phone of (918) 744-2553. NPI 1003837600 was issued on 07/21/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FITTER most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 17 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $294 in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Anatomic Pathology & Clinical Pathology Physician is a mid-sized specialty nationwide, with 13,692 enrolled providers across 55 states and an average of 284 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

1923 S UTICA AVE
TULSA, OK 74104

Provider Details

NPI 1003837600
Specialty Anatomic Pathology & Clinical Pathology Physician
Credentials M.D.
Gender Male
NPI Issued 07/21/2006

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

17
Total Claims
$294
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
45
Total Day Supply
1,292
Brand Drug Cost
$0
Generic Drug Cost
$294

Patient Demographics

Average Patient Age
76.5 years
Avg HCC Risk Score
0.35

Anatomic Pathology & Clinical Pathology Physician Overview

How WILLIAM FITTER, M.D. fits within the Anatomic Pathology & Clinical Pathology Physician landscape nationally.

13,692
Anatomic Pathology & Clinical Pathology Physician Providers in US
55
States with Anatomic Pathology & Clinical Pathology Physician
284
Avg Claims per Provider

WILLIAM FITTER, M.D.'s 17 claims are below the specialty average of 284.

Nearby Anatomic Pathology & Clinical Pathology Physician Providers in Oklahoma

Other clinicians with the same primary specialty enrolled in Oklahoma, drawn from the same CMS NPPES roster as FITTER.

Compare Anatomic Pathology & Clinical Pathology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is WILLIAM FITTER, M.D.'s specialty?
WILLIAM FITTER, M.D. specializes in Anatomic Pathology & Clinical Pathology Physician and practices in TULSA, Oklahoma. Credentials: M.D..
How much does WILLIAM FITTER, M.D. prescribe under Medicare Part D?
In 2023, WILLIAM FITTER, M.D. wrote 17 Medicare Part D claims totaling $294 in drug costs for N/A beneficiaries.
Where is WILLIAM FITTER, M.D. located?
WILLIAM FITTER, M.D. is located at 1923 S UTICA AVE, TULSA, OK, 74104. Phone: (918) 744-2553.
What is WILLIAM FITTER, M.D.'s NPI number?
WILLIAM FITTER, M.D.'s National Provider Identifier (NPI) is 1003837600, issued on 07/21/2006.
How many Anatomic Pathology & Clinical Pathology Physician providers are there in the US?
There are 13,692 Anatomic Pathology & Clinical Pathology Physician providers across 55 states in the US. The average Anatomic Pathology & Clinical Pathology Physician provider writes 284 Medicare Part D claims per year.
Does WILLIAM FITTER, M.D. accept Medicare?
WILLIAM FITTER, M.D. appears in CMS Medicare data with 17 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM FITTER, M.D.'s credentials?
WILLIAM FITTER, M.D.'s NPI is 1003837600 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology