NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1174694749 MD
Verify on CMS → John Blackman, MD
Endocrinology, Diabetes & Metabolism Physician in Columbus, Ohio.
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
5K
Medicare Part D claims · 583 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
44%
generic claims · 44% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
81.3/100
▼ 2 pts below national avg 83.1 · Above neutral
Industry payments
$295.63
7 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
John Blackman, MD reported a CMS MIPS final score of 81.3/100 - below the 83.1 national average - and filed 5,336 Medicare Part D claims in 2023.
- 81.3/100
- MIPS score · -2 vs avg
- 5K
- Part D claims, 2023
- 44%
- 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.
John Blackman, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
81 36th percentile higher than 36% 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 John Blackman, MD 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, John Blackman, MD writes more Part D claims than 82% of them and scores higher on MIPS quality than 38% - placing this provider in the high-volume, lower-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 John Blackman, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
John Blackman, MD 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 John Blackman, MD?
Near national averagePrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
5,336 102% vs specialty avg
MIPS final score
81.3/100 1.8 pts vs avg
Specialty distribution in Ohio
How Endocrinology, Diabetes & Metabolism Physician compares to other specialties among Ohio providers
Medicare quality performance, MIPS
John Blackman, MD's 2023 MIPS final score plotted against the Endocrinology, Diabetes & Metabolism Physician national average
- MIPS Final Score
- 81.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Endocrinology, Diabetes & Metabolism Physician) - 81.3/100 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).
John Blackman, MD appears in the CMS NPPES registry as a Endocrinology, Diabetes & Metabolism Physician provider holding MD credentials at 500 E MAIN ST, Columbus, OH, 43215, with a listed phone of (614) 566-9922. NPI 1174694749 was issued on 11/13/2006.
Medicare Part D records for calendar year 2023 show 5,336 prescription claims written by this provider, covering 583 Medicare beneficiaries and totaling roughly $3.3 million in drug spend, split 44% brand-name and 44% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 81.3/100 for the 2023 performance year (Quality 73.6, Cost 65.8), compared with the national average of 83.1.
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 | 1174694749 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 11/13/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
81.3083
Final Score
Avg: 83.1
73.5834
Quality
65.7777
Cost
98
Promoting Interoperability
Reporting: Group practice
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 John Blackman, MD. Source: openpaymentsdata.cms.gov.
Total received
$296
Largest payer
Abbott Laboratories
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.
License & disciplinary context - Ohio OMB 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 ~48K Ohio medical licensees in 2023 - they are NOT specific to John Blackman, MD. To verify John Blackman, MD's current license status, search the OMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
158
Total board actions, Ohio 2023
Across 154 cases
3.29
Actions per 1,000 licensees
Ohio statewide rate
probation
Most common action type
56 cases
OMB 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 Ohio disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
John Blackman, MD - brand share 44.0%
Endocrinology, Diabetes & Metabolism Physician average
44% brand-name claims vs 44% generic, on 5,336 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.
5,336
Total Claims
$3.3M
Total Drug Cost
583
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 12,690
- Total Day Supply
- 377,584
- Brand vs Generic
- 44% brand / 44% generic
- Brand Drug Cost
- $3.1M
- Generic Drug Cost
- $80K
Patient Demographics
- Average Patient Age
- 71.0 years
- Avg HCC Risk Score
- 1.76
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 85, 65-74: 304, 75-84: 160, 85+: 34
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John Blackman, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
567 claims
- Trulicity
Trulicity
378 claims
- Atorvastatin Calcium
Atorvastatin Calcium
297 claims
- Metformin Hcl Er 179
Metformin Hcl Er
179 claims
- Metformin Hcl 168
Metformin Hcl
168 claims
- Ozempic 154
Ozempic
154 claims
- Jardiance 123
Jardiance
123 claims
- Amlodipine Besylate 111
Amlodipine Besylate
111 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 567 |
| Trulicity Dulaglutide | 378 |
| Atorvastatin Calcium | 297 |
| Metformin Hcl Er Metformin Hcl | 179 |
| Metformin Hcl | 168 |
| Ozempic Semaglutide | 154 |
| Jardiance Empagliflozin | 123 |
| Amlodipine Besylate | 111 |
| Novolog Flexpen Insulin Aspart | 107 |
| Synthroid Levothyroxine Sodium | 107 |
* 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 OH →
All providers in Ohio →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How John Blackman, MD 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
John Blackman, MD's 5,336 claims are above the specialty average of 2,639.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Ohio
Other clinicians with the same primary specialty enrolled in Ohio, drawn from the same CMS NPPES roster as Blackman.
Fadia Abdo
Cleveland, OH
Dr. Abdul-Badi Abou-Samra
M.D., PH.D.
Toledo, OH
Dr. Milad Abusag
MD
Poland, OH
Dr. Hussein Adly
M.D.
Mansfield, OH
Dr. Omar Akhtar
M.B.B.S.
Cincinnati, OH
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 Ohio 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 John Blackman, MD's specialty? ▼
John Blackman, MD specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Columbus, Ohio. Credentials: MD.
How much does John Blackman, MD prescribe under Medicare Part D? ▼
In 2023, John Blackman, MD wrote 5,336 Medicare Part D claims totaling $3.3M in drug costs for 583 beneficiaries.
What is John Blackman, MD's Medicare quality score? ▼
John Blackman, MD has a CMS MIPS Final Score of 81.3/100 (Quality: 73.6, Cost: 65.8). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is John Blackman, MD located? ▼
John Blackman, MD is located at 500 E MAIN ST, Columbus, OH, 43215. Phone: (614) 566-9922.
What is John Blackman, MD's NPI number? ▼
John Blackman, MD's National Provider Identifier (NPI) is 1174694749, issued on 11/13/2006.
Does John Blackman, MD prescribe more brand-name or generic drugs? ▼
John Blackman, MD's prescribing is 44% brand-name and 44% generic drugs by claim count, with $3.1M 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 John Blackman, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, John Blackman, MD's most frequently prescribed drugs include Levothyroxine Sodium, Trulicity, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Blackman, MD accept Medicare? ▼
John Blackman, MD appears in CMS Medicare data with 5,336 Part D claims and 583 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Blackman, MD's credentials? ▼
John Blackman, MD's NPI is 1174694749 with credentials MD. 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.