NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1235291790
Verify on CMS → David Ehrmann
Endocrinology, Diabetes & Metabolism Physician in Chicago, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 7,871 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
2K
Medicare Part D claims · 167 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
35%
generic claims · 55% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
97.7/100
▲ 15 pts above national avg 83.1 · Exceptional
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
David Ehrmann reported a CMS MIPS final score of 97.7/100 - above the 83.1 national average - and filed 1,628 Medicare Part D claims in 2023.
- 97.7/100
- MIPS score · +15 vs avg
- 2K
- Part D claims, 2023
- 35%
- 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.
David Ehrmann's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
98 Top 15% higher than 85% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where David Ehrmann sits
This provider among endocrinology, diabetes & metabolism physician peers
Across the 2,521 endocrinology, diabetes & metabolism physician providers who report both Medicare Part D prescribing and a MIPS quality score, David Ehrmann writes more Part D claims than 37% of them and scores higher on MIPS quality than 89% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one endocrinology, diabetes & metabolism physician peer from a representative sample of 60; the gold marker is David Ehrmann. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
David Ehrmann practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 David Ehrmann?
High performer (top quartile)Primary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
1,628 38% vs specialty avg
MIPS final score
97.7/100 14.6 pts vs avg
Specialty distribution in Illinois
How Endocrinology, Diabetes & Metabolism Physician compares to other specialties among Illinois providers
Medicare quality performance, MIPS
David Ehrmann's 2023 MIPS final score plotted against the Endocrinology, Diabetes & Metabolism Physician national average
- MIPS Final Score
- 97.7/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Endocrinology, Diabetes & Metabolism Physician) - 97.7/100 vs national avg 83.1
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).
David Ehrmann appears in the CMS NPPES registry as an Endocrinology, Diabetes & Metabolism Physician provider at 5841 S MARYLAND AVE, Chicago, IL, 60637, with a listed phone of (888) 824-0200. NPI 1235291790 was issued on 12/14/2006.
Medicare Part D records for calendar year 2023 show 1,628 prescription claims written by this provider, covering 167 Medicare beneficiaries and totaling roughly $1.1 million in drug spend, split 55% brand-name and 35% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 97.7/100 for the 2023 performance year (Quality 75.4), compared with the national average of 83.1.
Endocrinology, Diabetes & Metabolism Physician is a mid-sized specialty nationwide, with 7,871 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 | 1235291790 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Gender | Male |
| NPI Issued | 12/14/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
97.7188
Final Score
Avg: 83.1
75.4375
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
License & disciplinary context - Illinois IDFPR 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~42K Illinois medical licensees in 2023 - they are NOT specific to David Ehrmann. To verify David Ehrmann's current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Brand-heavy
David Ehrmann - brand share 55.0%
Endocrinology, Diabetes & Metabolism Physician average
55% brand-name claims vs 35% generic, on 1,628 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.
1,628
Total Claims
$1.1M
Total Drug Cost
167
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,354
- Total Day Supply
- 99,070
- Brand vs Generic
- 55% brand / 35% generic
- Brand Drug Cost
- $1.0M
- Generic Drug Cost
- $22K
Patient Demographics
- Average Patient Age
- 68.7 years
- Avg HCC Risk Score
- 2.14
- Gender Split
- 59% female / 41% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What David Ehrmann prescribes most
Top Medicare Part D drugs by claim count, 2023
- Trulicity
Trulicity
140 claims
- Ozempic
Ozempic
107 claims
- Tresiba Flextouch …
Tresiba Flextouch U-100
102 claims
- Metformin Hcl
Metformin Hcl
79 claims
- Jardiance
Jardiance
71 claims
- Mounjaro
Mounjaro
70 claims
- Metformin Hcl Er
Metformin Hcl Er
65 claims
- Novolog Flexpen
Novolog Flexpen
63 claims
| Drug | Claims |
|---|---|
| Trulicity Dulaglutide | 140 |
| Ozempic Semaglutide | 107 |
| Tresiba Flextouch U-100 Insulin Degludec | 102 |
| Metformin Hcl | 79 |
| Jardiance Empagliflozin | 71 |
| Mounjaro Tirzepatide | 70 |
| Metformin Hcl Er Metformin Hcl | 65 |
| Novolog Flexpen Insulin Aspart | 63 |
| Atorvastatin Calcium | 53 |
| Levothyroxine Sodium | 35 |
* 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 IL →
All providers in Illinois →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How David Ehrmann fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
7,871
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider
David Ehrmann's 1,628 claims are below the specialty average of 2,639.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Ehrmann.
Dr. Maha Abboud
MD FACE
Melrose Park, IL
Dr. Jumana Abdelkarim
MD
Springfield, IL
Dr. Toufic Abdo
MD
Champaign, IL
Dr. Issa Abedmahmoud
MD
Herrin, IL
Dr. Makarem Abulimon
M.D.
Springfield, IL
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 Illinois 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 David Ehrmann's specialty? ▼
David Ehrmann specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Chicago, Illinois.
How much does David Ehrmann prescribe under Medicare Part D? ▼
In 2023, David Ehrmann wrote 1,628 Medicare Part D claims totaling $1.1M in drug costs for 167 beneficiaries.
What is David Ehrmann's Medicare quality score? ▼
David Ehrmann has a CMS MIPS Final Score of 97.7/100 (Quality: 75.4). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is David Ehrmann located? ▼
David Ehrmann is located at 5841 S MARYLAND AVE, Chicago, IL, 60637. Phone: (888) 824-0200.
What is David Ehrmann's NPI number? ▼
David Ehrmann's National Provider Identifier (NPI) is 1235291790, issued on 12/14/2006.
Does David Ehrmann prescribe more brand-name or generic drugs? ▼
David Ehrmann's prescribing is 55% brand-name and 35% generic drugs by claim count, with $1.0M in brand drug costs.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 7,871 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 David Ehrmann prescribe most often? ▼
Based on 2023 Medicare Part D data, David Ehrmann's most frequently prescribed drugs include Trulicity, Ozempic, Tresiba Flextouch U-100. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does David Ehrmann accept Medicare? ▼
David Ehrmann appears in CMS Medicare data with 1,628 Part D claims and 167 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify David Ehrmann's credentials? ▼
David Ehrmann's NPI is 1235291790. 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.