John D. Blackman, MD
Endocrinology, Diabetes & Metabolism Physician · Columbus, OH
John D. Blackman, MD is an endocrinology, diabetes & metabolism physician with a practice address in Columbus, Ohio, and NPI 1174694749, issued on Nov 13, 2006. Check the license (Ohio 35054974, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- John D. Blackman
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 35054974 OH
Self-reported in NPPES; status is on the state search - Practice location
- 500 E Main St, Columbus, OH 43215
- Phone
- (614) 566-9922
- Enumerated
- Nov 13, 2006
- Record last updated
- Mar 4, 2025
- Fax
- (614) 566-8610
- Medicaid ID
- 0935573 OH
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 352 in Ohio → Look up another NPI →
Also registered at 500 E Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Katherine Adams, PHARMDPharmacist1548493034
- Gail AhernProfessional Counselor1669887055
- Makayla Allen, LSWSocial Worker1366058117
- Reginald Ash, LPCCProfessional Counselor1477722742
- John Baluch, MD PHDUrology Physician1669441812
- Emily Barker, LPCCProfessional Counselor1255976429
Verify John D. Blackman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35054974Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average endocrinology, diabetes & metabolism physician in 2024
5,410 Medicare Part D claims for 544 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 46% of claims.
Most prescribed
- Levothyroxine Sodium563 claims
- Trulicity303 claims
- Atorvastatin Calcium302 claims
- Lantus Solostar217 claims
- Ozempic210 claims
- Omnipod 5 Dexg7g6 Pods (Gen 5)194 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 81.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $295.63
7 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
John D. Blackman among 352 endocrinology, diabetes & metabolism physician records in Ohio
John D. Blackman, MD is one of 352 endocrinology, diabetes & metabolism physician records with a practice address in Ohio. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 56% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2025 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Ohio
There are 352 endocrinology, diabetes & metabolism physician records in Ohio.
All 352 in Ohio → Every provider in Columbus → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- William Lutmer, MDColumbus, OH 432151245279876
- Samuel Anderson, M.D.Columbus, OH 432141902883135
- Romi Bhasin, M.D., PHDColumbus, OH 432141588653711
- Laura Butz, MDColumbus, OH 432141538452404
- Daryl Cottrell, MDColumbus, OH 432141174507123
- Ravi Dhawale, MDColumbus, OH 432141023051299
- Leslie Hoffman, MDColumbus, OH 432141891858312
- Constantine Kroustos, MDColumbus, OH 432141750404984
Common questions
What is John D. Blackman, MD's NPI number?
John D. Blackman, MD's National Provider Identifier (NPI) is 1174694749, issued on Nov 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John D. Blackman, MD located?
The NPPES record lists a practice address at 500 E Main St, Columbus, OH, 43215. Phone: (614) 566-9922. Providers update this record themselves, so call before visiting.
How can I verify John D. Blackman, MD's license?
NPPES lists Ohio license number 35054974, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John D. Blackman, MD prescribe under Medicare Part D?
In 2024, John D. Blackman, MD had 5,410 Medicare Part D claims for 544 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is John D. Blackman, MD's MIPS final score?
The 2023 MIPS final score is 81.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.