John Macksood, D.O.
Gastroenterology Physician · Grand Blanc, MI
John Macksood, D.O. is a gastroenterology physician with a practice address in Grand Blanc, Michigan, and NPI 1952387797, issued on Dec 22, 2005. Check the license (Michigan 5101012207, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- John Macksood
- Credential
- D.O.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 5101012207 MI
Self-reported in NPPES; status is on the state search - Practice location
- 600 Health Park Blvd, Grand Blanc, MI 48439
- Phone
- (810) 603-8400
- Enumerated
- Dec 22, 2005
- Record last updated
- Jan 4, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicaid ID
- 3474260 MI
- Medicare enrollment
- Enrolled (PECOS I20040910000206); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Osteopathic Medicine, 1993
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 550 in Michigan → Look up another NPI →
Also registered at 600 Health Park Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Riad Dali Ahmad, MDInfectious Disease Physician1124130539
- Marshall Grillo, DOVascular Surgery Physician1730114448
- Nicole Hering, PAMedical Physician Assistant1013229012
- Kaitlyn Hill, FNP-CFamily Nurse Practitioner1982204640
- Justin Miller, D.O.Gastroenterology Physician1104879493
- Mark Minaudo, DOGastroenterology Physician1942239819
Verify John Macksood in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 5101012207Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% more Medicare Part D claims than the average gastroenterology physician in 2024
1,169 Medicare Part D claims for 455 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Peg 3350-Electrolyte195 claims
- Omeprazole163 claims
- Famotidine149 claims
- Pantoprazole Sodium72 claims
- Humira(Cf) Pen67 claims
- Mesalamine49 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.
Industry payments in 2024: $99.03
6 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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.
Bills Medicare through one group practice
- Flint Gastroenterology Associates PCGrand Blanc, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Macksood among 550 gastroenterology physician records in Michigan
John Macksood, D.O. is one of 550 gastroenterology physician records with a practice address in Michigan. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 87% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated1993 · median 2003 among the 415 with a school on file
- Record last updated2010 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Michigan
There are 550 gastroenterology physician records in Michigan.
All 550 in Michigan → Every provider in Grand Blanc → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Nathan Landesman, D.O.Grand Blanc, MI 484391457397143
- Justin Miller, D.O.Grand Blanc, MI 484391104879493
- Mark Minaudo, DOGrand Blanc, MI 484391942239819
- Michael Neumann, D.O.Grand Blanc, MI 484391578549325
- Richard Smith, D.O.Grand Blanc, MI 484391750367504
- Jeffrey SobeckiGrand Blanc, MI 484391245779099
- Derek Thigpin, DOGrand Blanc, MI 484391265691380
- Brandon Wiggins, DO, MPHGrand Blanc, MI 484391689238693
Common questions
What is John Macksood, D.O.'s NPI number?
John Macksood, D.O.'s National Provider Identifier (NPI) is 1952387797, issued on Dec 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Macksood, D.O. located?
The NPPES record lists a practice address at 600 Health Park Blvd, Grand Blanc, MI, 48439. Phone: (810) 603-8400. Providers update this record themselves, so call before visiting.
How can I verify John Macksood, D.O.'s license?
NPPES lists Michigan license number 5101012207, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Macksood, D.O. prescribe under Medicare Part D?
In 2024, John Macksood, D.O. had 1,169 Medicare Part D claims for 455 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
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.