NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1770716185 M.D.
Verify on CMS → Maxfield Flynn, M.D.
Endocrinology, Diabetes & Metabolism Physician in Madison, 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 7,852 in Endocrinology, Diabetes & Metabolism 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
947
Medicare Part D claims · 138 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
39%
generic claims · 51% brand-name · higher generic rates reduce patient out-of-pocket costs
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
Maxfield Flynn, M.D. filed 947 Medicare Part D claims in 2023 as a Endocrinology, Diabetes & Metabolism Physician in Madison, Wisconsin, prescribing 39% generic.
- 947
- Part D claims, 2023
- 39%
- 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.
Maxfield Flynn, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
947 Top 25% higher than 75% 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)
Maxfield Flynn, 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 Maxfield Flynn, M.D.?
Quality data not reportedPrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
947 64% vs specialty avg
Specialty distribution in Wisconsin
How Endocrinology, Diabetes & Metabolism 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 Endocrinology, Diabetes & Metabolism 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).
Maxfield Flynn, M.D. appears in the CMS NPPES registry as a Endocrinology, Diabetes & Metabolism Physician provider holding M.D. credentials at 451 JUNCTION RD, Madison, WI, 53717, with a listed phone of (608) 263-5010. NPI 1770716185 was issued on 09/01/2009.
Medicare Part D records for calendar year 2023 show 947 prescription claims written by this provider, covering 138 Medicare beneficiaries and totaling roughly $376K in drug spend, split 51% brand-name and 39% generic by claim count.
Endocrinology, Diabetes & Metabolism Physician is a mid-sized specialty nationwide, with 7,852 enrolled providers across 54 states and an average of 2,639 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 | 1770716185 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 09/01/2009 |
Hospital and facility affiliations
Facilities where Maxfield Flynn, 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.
University OF Wisconsin Medical Foundation Inc
Madison, 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).
Brand vs generic prescribing mix · Brand-heavy
Maxfield Flynn, M.D. - brand share 51.0%
Endocrinology, Diabetes & Metabolism Physician average
51% brand-name claims vs 39% generic, on 947 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.
947
Total Claims
$376K
Total Drug Cost
138
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,948
- Total Day Supply
- 56,842
- Brand vs Generic
- 51% brand / 39% generic
- Brand Drug Cost
- $356K
- Generic Drug Cost
- $8K
Patient Demographics
- Average Patient Age
- 69.0 years
- Avg HCC Risk Score
- 1.63
- Gender Split
- 51% female / 49% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Maxfield Flynn, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
180 claims
- Methimazole 57
Methimazole
57 claims
- Ozempic 42
Ozempic
42 claims
- Trulicity 39
Trulicity
39 claims
- Synthroid 37
Synthroid
37 claims
- Metformin Hcl 34
Metformin Hcl
34 claims
- Calcitriol 25
Calcitriol
25 claims
- Hydrocortisone 25
Hydrocortisone
25 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 180 |
| Methimazole | 57 |
| Ozempic Semaglutide | 42 |
| Trulicity Dulaglutide | 39 |
| Synthroid Levothyroxine Sodium | 37 |
| Metformin Hcl | 34 |
| Calcitriol | 25 |
| Hydrocortisone | 25 |
| Atorvastatin Calcium | 19 |
| Testosterone Cypionate | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Endocrinology, Diabetes & Metabolism Physician in WI →
All providers in Wisconsin →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Maxfield Flynn, M.D. fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
7,852
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider
Maxfield Flynn, M.D.'s 947 claims are below the specialty average of 2,639.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Flynn.
Dr. Laura Andrews
MD
Menasha, WI
Dr. Arnold Asp
MD
La Crosse, WI
Dr. Pamela Baeten
M.D.
Green Bay, WI
Dr. Adrienne Barnosky
D.O.
Wauwatosa, WI
Dr. Jaspreet Batth
MD
Sheboygan, WI
Compare Endocrinology, Diabetes & Metabolism Physician nationally: see state-by-state distribution →
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 Endocrinology, Diabetes & Metabolism 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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Medical Specialties Explained
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Frequently Asked Questions
What is Maxfield Flynn, M.D.'s specialty? ▼
Maxfield Flynn, M.D. specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Madison, Wisconsin. Credentials: M.D..
How much does Maxfield Flynn, M.D. prescribe under Medicare Part D? ▼
In 2023, Maxfield Flynn, M.D. wrote 947 Medicare Part D claims totaling $376K in drug costs for 138 beneficiaries.
Where is Maxfield Flynn, M.D. located? ▼
Maxfield Flynn, M.D. is located at 451 JUNCTION RD, Madison, WI, 53717. Phone: (608) 263-5010.
What is Maxfield Flynn, M.D.'s NPI number? ▼
Maxfield Flynn, M.D.'s National Provider Identifier (NPI) is 1770716185, issued on 09/01/2009.
Does Maxfield Flynn, M.D. prescribe more brand-name or generic drugs? ▼
Maxfield Flynn, M.D.'s prescribing is 51% brand-name and 39% generic drugs by claim count, with $356K in brand drug costs.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 7,852 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,639 Medicare Part D claims per year.
What drugs does Maxfield Flynn, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Maxfield Flynn, M.D.'s most frequently prescribed drugs include Levothyroxine Sodium, Methimazole, Ozempic. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Maxfield Flynn, M.D. accept Medicare? ▼
Maxfield Flynn, M.D. appears in CMS Medicare data with 947 Part D claims and 138 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Maxfield Flynn, M.D.'s credentials? ▼
Maxfield Flynn, M.D.'s NPI is 1770716185 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.