2026 NPPES data Addiction Medicine (Anesthesiology) Physician NPI 1255695888 M.D., MHS
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GBOLAHAN OYINLOYE, M.D., MHS

Addiction Medicine (Anesthesiology) Physician in APPLETON, Wisconsin. 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
102
Medicare Part D claims · 36 beneficiaries · Addiction Medicine (Anesthesiology) Physician avg: 814

What the federal data shows

GBOLAHAN OYINLOYE, M.D., MHS filed 102 Medicare Part D claims in 2023 as a Addiction Medicine (Anesthesiology) Physician in APPLETON, Wisconsin.

102
Part D claims, 2023
Likely
board-certified (heuristic)

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.

GBOLAHAN OYINLOYE, M.D., MHS's Medicare Part D volume vs every U.S. prescriber

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

102 35th percentile higher than 35% 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 certification likely (heuristic — not verified)

GBOLAHAN OYINLOYE, M.D., MHS practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about GBOLAHAN OYINLOYE, M.D., MHS?

Quality data not reported

NPI registry status

Active

Issued 06/28/2012

NPI 1255695888

Primary specialty

Addiction Medicine (Anesthesiology) Physician

Rare

129 US NPIs in this specialty

Medicare Part D claims

102 87% vs specialty avg

2023 prescription claims

Specialty avg: 814

Specialty distribution in Wisconsin

How Addiction Medicine (Anesthesiology) Physician compares to other specialties among Wisconsin providers

Wisconsin providers

Addiction Medicine (Anesthesiology) Physician share within Wisconsin

1. Addiction Medicine (Anesthesiology) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Addiction Medicine (Anesthesiology) Physician share within Wisconsin

Specialty board-certification context

Estimated specialty board-certified rate — Addiction Medicine (Anesthesiology) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Addiction Medicine (Anesthesiology) Physician ABMS/AOA estimate

Est. board-certified rate (Addiction Medicine (Anesthesiology) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Addiction Medicine (Anesthesiology) 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).

GBOLAHAN OYINLOYE, M.D., MHS appears in the CMS NPPES registry as a Addiction Medicine (Anesthesiology) Physician provider holding M.D., MHS credentials at 2500 E CAPITOL DR, APPLETON, WI, 54911, with a listed phone of (920) 720-2300. NPI 1255695888 was issued on 06/28/2012. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what OYINLOYE 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 102 prescription claims written by this provider, covering 36 Medicare beneficiaries and totaling roughly $4K 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.

Addiction Medicine (Anesthesiology) Physician is a narrow specialty nationwide, with 129 enrolled providers across 36 states and an average of 814 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

2500 E CAPITOL DR
APPLETON, WI 54911

Provider Details

NPI 1255695888
Specialty Addiction Medicine (Anesthesiology) Physician
Credentials M.D., MHS
Gender Male
NPI Issued 06/28/2012

Hospital and facility affiliations

Facilities where GBOLAHAN OYINLOYE, M.D., MHS bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

ASCENSION MEDICAL GROUP-FOX VALLEY WISCONSIN INC
APPLETON, WI
THEDACARE INCORPORATED
APPLETON, WI

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Medicare Part D Prescribing Data

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

102
Total Claims
$4K
Total Drug Cost
36
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
124
Total Day Supply
3,473
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
53.1 years
Avg HCC Risk Score
1.31
Gender Split
42% female / 58% male

Addiction Medicine (Anesthesiology) Physician Overview

How GBOLAHAN OYINLOYE, M.D., MHS fits within the Addiction Medicine (Anesthesiology) Physician landscape nationally.

129
Addiction Medicine (Anesthesiology) Physician Providers in US
36
States with Addiction Medicine (Anesthesiology) Physician
814
Avg Claims per Provider

GBOLAHAN OYINLOYE, M.D., MHS's 102 claims are below the specialty average of 814.

Nearby Addiction Medicine (Anesthesiology) Physician Providers in Wisconsin

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

Compare Addiction Medicine (Anesthesiology) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is GBOLAHAN OYINLOYE, M.D., MHS's specialty?
GBOLAHAN OYINLOYE, M.D., MHS specializes in Addiction Medicine (Anesthesiology) Physician and practices in APPLETON, Wisconsin. Credentials: M.D., MHS.
How much does GBOLAHAN OYINLOYE, M.D., MHS prescribe under Medicare Part D?
In 2023, GBOLAHAN OYINLOYE, M.D., MHS wrote 102 Medicare Part D claims totaling $4K in drug costs for 36 beneficiaries.
Where is GBOLAHAN OYINLOYE, M.D., MHS located?
GBOLAHAN OYINLOYE, M.D., MHS is located at 2500 E CAPITOL DR, APPLETON, WI, 54911. Phone: (920) 720-2300.
What is GBOLAHAN OYINLOYE, M.D., MHS's NPI number?
GBOLAHAN OYINLOYE, M.D., MHS's National Provider Identifier (NPI) is 1255695888, issued on 06/28/2012.
How many Addiction Medicine (Anesthesiology) Physician providers are there in the US?
There are 129 Addiction Medicine (Anesthesiology) Physician providers across 36 states in the US. The average Addiction Medicine (Anesthesiology) Physician provider writes 814 Medicare Part D claims per year.
Does GBOLAHAN OYINLOYE, M.D., MHS accept Medicare?
GBOLAHAN OYINLOYE, M.D., MHS appears in CMS Medicare data with 102 Part D claims and 36 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GBOLAHAN OYINLOYE, M.D., MHS's credentials?
GBOLAHAN OYINLOYE, M.D., MHS's NPI is 1255695888 with credentials M.D., MHS. 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