NPI registry status
Active
2026 NPPES data Allergy & Immunology (Internal Medicine) Physician NPI 1689998262 M.D.
Verify on CMS → Nana Sarkoah Fenny, M.D.
Allergy & Immunology (Internal Medicine) Physician in Green Bay, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 517 in Allergy & Immunology (Internal Medicine) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
24
Medicare Part D claims · 13 beneficiaries · Allergy & Immunology (Internal Medicine) Physician avg: 798
Generic prescribing
54%
generic claims · 46% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$75.95
3 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Nana Sarkoah Fenny, M.D. filed 24 Medicare Part D claims in 2023 as a Allergy & Immunology (Internal Medicine) Physician in Green Bay, Wisconsin, prescribing 54% generic.
- 24
- Part D claims, 2023
- 54%
- generic prescribing
- 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.
Nana Sarkoah Fenny, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
24 0th percentile higher than 0% of 1,370,886 prescribers
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)
Nana Sarkoah Fenny, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - 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 Nana Sarkoah Fenny, M.D.?
Quality data not reportedPrimary specialty
Allergy & Immunology (Internal Medicine) Physician
Medicare Part D claims
24 97% vs specialty avg
Specialty distribution in Wisconsin
How Allergy & Immunology (Internal Medicine) Physician compares to other specialties among Wisconsin providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Allergy & Immunology (Internal Medicine) Physician. Verify directly:
How MIPS and board certification work
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).
Nana Sarkoah Fenny, M.D. appears in the CMS NPPES registry as an Allergy & Immunology (Internal Medicine) Physician provider holding M.D. credentials at 519 S MONROE AVE, Green Bay, WI, 54301, with a listed phone of (920) 435-6601. NPI 1689998262 was issued on 03/25/2010.
Medicare Part D records for calendar year 2023 show 24 prescription claims written by this provider, covering 13 Medicare beneficiaries and totaling roughly $4K in drug spend, split 46% brand-name and 54% generic by claim count.
Allergy & Immunology (Internal Medicine) Physician is a narrow specialty nationwide, with 517 enrolled providers across 47 states and an average of 798 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
Provider Details
| NPI | 1689998262 |
|---|---|
| Specialty | Allergy & Immunology (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 03/25/2010 |
Hospital and facility affiliations
Facilities where Nana Sarkoah Fenny, M.D. 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.
Bellin Memorial Hospital Inc
Green Bay, 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).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Nana Sarkoah Fenny, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$76
Largest payer
Takeda Pharmaceuticals U.S.A., Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Above average
Nana Sarkoah Fenny, M.D. - brand share 46.0%
Allergy & Immunology (Internal Medicine) Physician average
46% brand-name claims vs 54% generic, on 24 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
24
Total Claims
$4K
Total Drug Cost
13
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 31
- Total Day Supply
- 861
- Brand vs Generic
- 46% brand / 54% generic
- Brand Drug Cost
- $3K
- Generic Drug Cost
- $257
Patient Demographics
- Average Patient Age
- 68.0 years
- Avg HCC Risk Score
- 0.95
More Allergy & Immunology (Internal Medicine) Physician in WI →
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Allergy & Immunology (Internal Medicine) Physician Overview
How Nana Sarkoah Fenny, M.D. fits within the Allergy & Immunology (Internal Medicine) Physician landscape nationally.
517
Allergy & Immunology (Internal Medicine) Physician Providers in US
47
States with Allergy & Immunology (Internal Medicine) Physician
798
Avg Claims per Provider
Nana Sarkoah Fenny, M.D.'s 24 claims are below the specialty average of 798.
Nearby Allergy & Immunology (Internal Medicine) Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Fenny.
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Wisconsin medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Allergy & Immunology (Internal Medicine) Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Nana Sarkoah Fenny, M.D.'s specialty? ▼
Nana Sarkoah Fenny, M.D. specializes in Allergy & Immunology (Internal Medicine) Physician and practices in Green Bay, Wisconsin. Credentials: M.D..
How much does Nana Sarkoah Fenny, M.D. prescribe under Medicare Part D? ▼
In 2023, Nana Sarkoah Fenny, M.D. wrote 24 Medicare Part D claims totaling $4K in drug costs for 13 beneficiaries.
Where is Nana Sarkoah Fenny, M.D. located? ▼
Nana Sarkoah Fenny, M.D. is located at 519 S MONROE AVE, Green Bay, WI, 54301. Phone: (920) 435-6601.
What is Nana Sarkoah Fenny, M.D.'s NPI number? ▼
Nana Sarkoah Fenny, M.D.'s National Provider Identifier (NPI) is 1689998262, issued on 03/25/2010.
Does Nana Sarkoah Fenny, M.D. prescribe more brand-name or generic drugs? ▼
Nana Sarkoah Fenny, M.D.'s prescribing is 46% brand-name and 54% generic drugs by claim count, with $3K in brand drug costs.
How many Allergy & Immunology (Internal Medicine) Physician providers are there in the US? ▼
There are 517 Allergy & Immunology (Internal Medicine) Physician providers across 47 states in the US. The average Allergy & Immunology (Internal Medicine) Physician provider writes 798 Medicare Part D claims per year.
Does Nana Sarkoah Fenny, M.D. accept Medicare? ▼
Nana Sarkoah Fenny, M.D. appears in CMS Medicare data with 24 Part D claims and 13 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nana Sarkoah Fenny, M.D.'s credentials? ▼
Nana Sarkoah Fenny, M.D.'s NPI is 1689998262 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
View source datasets and methodology notes
- 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
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.