NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1053423434 M.D.
Verify on CMS → Michael Altheimer, M.D.
Endocrinology, Diabetes & Metabolism Physician in Winston Salem, North Carolina.
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
334
Medicare Part D claims · 95 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
67%
generic claims · 29% 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
Michael Altheimer, M.D. filed 334 Medicare Part D claims in 2023 as a Endocrinology, Diabetes & Metabolism Physician in Winston Salem, North Carolina, prescribing 67% generic.
- 334
- Part D claims, 2023
- 67%
- generic prescribing
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.
Michael Altheimer, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
334 Top 43% higher than 57% 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-eligible specialty (heuristic, not verified)
Michael Altheimer, 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 Michael Altheimer, M.D.?
Quality data not reportedPrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
334 87% vs specialty avg
Specialty distribution in North Carolina
How Endocrinology, Diabetes & Metabolism Physician compares to other specialties among North Carolina 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).
Michael Altheimer, M.D. appears in the CMS NPPES registry as a Endocrinology, Diabetes & Metabolism Physician provider holding M.D. credentials at MEDICAL CENTER BLVD, Winston Salem, NC, 27157, with a listed phone of (336) 716-2255. NPI 1053423434 was issued on 08/31/2006.
Medicare Part D records for calendar year 2023 show 334 prescription claims written by this provider, covering 95 Medicare beneficiaries and totaling roughly $83K in drug spend, split 29% brand-name and 67% 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 | 1053423434 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/31/2006 |
Brand vs generic prescribing mix · Above average
Michael Altheimer, M.D. - brand share 29.0%
Endocrinology, Diabetes & Metabolism Physician average
29% brand-name claims vs 67% generic, on 334 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.
334
Total Claims
$83K
Total Drug Cost
95
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 796
- Total Day Supply
- 23,809
- Brand vs Generic
- 29% brand / 67% generic
- Brand Drug Cost
- $76K
- Generic Drug Cost
- $6K
Patient Demographics
- Average Patient Age
- 76.7 years
- Avg HCC Risk Score
- 1.38
- Gender Split
- 46% female / 54% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Michael Altheimer, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Pioglitazone Hcl
Pioglitazone Hcl
25 claims
- Atorvastatin Calcium
Atorvastatin Calcium
21 claims
- Synthroid
Synthroid
21 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
19 claims
- Metformin Hcl
Metformin Hcl
18 claims
- Metformin Hcl Er
Metformin Hcl Er
18 claims
| Drug | Claims |
|---|---|
| Pioglitazone Hcl | 25 |
| Atorvastatin Calcium | 21 |
| Synthroid Levothyroxine Sodium | 21 |
| Rosuvastatin Calcium | 19 |
| Metformin Hcl | 18 |
| Metformin Hcl Er Metformin Hcl | 18 |
* 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 NC →
All providers in North Carolina →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Michael Altheimer, 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
Michael Altheimer, M.D.'s 334 claims are below the specialty average of 2,639.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in North Carolina
Other clinicians with the same primary specialty enrolled in North Carolina, drawn from the same CMS NPPES roster as Altheimer.
Dr. Oluyemisi Abdulsalam
MD
Raleigh, NC
Dr. Deanna Adkins
M.D.
Durham, NC
Dr. Guadalupe Andrade
FNP-C
Gastonia, NC
Dr. Ghobad Azizi
M.D.
Wilmington, NC
Dr. Anthony Azzi
M.D.
Raleigh, NC
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 North Carolina 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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Frequently Asked Questions
What is Michael Altheimer, M.D.'s specialty? ▼
Michael Altheimer, M.D. specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Winston Salem, North Carolina. Credentials: M.D..
How much does Michael Altheimer, M.D. prescribe under Medicare Part D? ▼
In 2023, Michael Altheimer, M.D. wrote 334 Medicare Part D claims totaling $83K in drug costs for 95 beneficiaries.
Where is Michael Altheimer, M.D. located? ▼
Michael Altheimer, M.D. is located at MEDICAL CENTER BLVD, Winston Salem, NC, 27157. Phone: (336) 716-2255.
What is Michael Altheimer, M.D.'s NPI number? ▼
Michael Altheimer, M.D.'s National Provider Identifier (NPI) is 1053423434, issued on 08/31/2006.
Does Michael Altheimer, M.D. prescribe more brand-name or generic drugs? ▼
Michael Altheimer, M.D.'s prescribing is 29% brand-name and 67% generic drugs by claim count, with $76K 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 Michael Altheimer, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Michael Altheimer, M.D.'s most frequently prescribed drugs include Pioglitazone Hcl, Atorvastatin Calcium, Synthroid. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Altheimer, M.D. accept Medicare? ▼
Michael Altheimer, M.D. appears in CMS Medicare data with 334 Part D claims and 95 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Altheimer, M.D.'s credentials? ▼
Michael Altheimer, M.D.'s NPI is 1053423434 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.