Dr. Gregory J. Forstall, MD
- Medicare services, 2024
- 2,634
- Medicare patients, 2024
- 352
- Part D claims, 2024
- 988
- MIPS score, 2024
- 82
- Hospital affiliations
- 4
- Practice address
- 401 S Ballenger Hwy, Flint, MI 48532
- Practice phone
- Call (810) 342-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
McLaren Flint Hospital
Flint, Michigan
Find Dr. Forstall's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gregory J. Forstall is an infectious disease specialist in Flint, Michigan
Dr. Forstall practices at McLaren Flint Hospital in Flint, Michigan.
Dr. Forstall's NPI, 1477642486, was assigned on October 11, 2006. Dr. Forstall graduated from Southern Illinois University School of Medicine in 1987. Dr. Forstall holds Michigan license 4301061462.
- NPI
- 1477642486NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6709814270
- NPI enumeration date
- October 11, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (810) 342-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory J. Forstall practices at McLaren Flint Hospital in Flint, Michigan
Dr. Forstall's primary practice is McLaren Flint Hospital, at 401 S Ballenger Hwy, Flint, MI 48532 in Genesee County. The practice phone is (810) 342-2000.
- McLaren Flint Hospital401 S Ballenger Hwy, Flint, MI 48532 · Genesee CountyPhone(810) 342-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gregory J. Forstall is affiliated with 6 sites of care and 1 medical group
Dr. Forstall's primary practice is McLaren Flint Hospital in Flint, Michigan. Dr. Forstall is also affiliated with McLaren Flint. The medical group on file is Gregory J. Forstall MD PC. Dmand AI also links Dr. Forstall to 3 more hospitals and 1 home health agency, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory J. Forstall's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Forstall practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| McLaren Flint Hospital | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory J. Forstall is one of 264 infectious disease specialists in Michigan
Infectious disease is Dr. Forstall's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Forstall is licensed in Michigan.
Specialties and state licenses
- Infectious disease, MichiganPrimary
Infectious disease specialists near Dr. Forstall
Counts of infectious disease specialists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory J. Forstall billed Medicare for 2,634 services in 2024
CMS data shows 2,634 Medicare services from Dr. Forstall across 8 procedure codes in 2024, for 352 Medicare patients. Medicare paid $185,419 for them.
Dr. Forstall's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2,5312024: 2,6214%
- Other services
- 2023: 192024: 1332%
Where Dr. Forstall's Medicare services took place, 2024
- In an office713%
- In a facility2,56397%
Dr. Forstall compared with the Michigan median for infectious disease specialists, 2024
- Dr. Forstall
- Michigan median
- Medicare services
- 2,634vs 3188.3 times
- Medicare patients
- 352vs 1432.5 times
- Part D claims
- 864vs 1396.2 times
Medians across 266 infectious disease specialists in Michigan with Dmand AI profiles that report each measure.
Dr. Forstall's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Forstall and other infectious disease specialists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory J. Forstall treated 352 Medicare patients in 2024, average age 74
CMS counts 352 Medicare patients who saw Dr. Forstall in 2024. The largest group is 75 to 84, with 128 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 27% are also on Medicaid. Their average risk score is 3.07, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Forstall's median patient age at 73, with 47% women.
Dr. Forstall's Medicare patients by age, 2024
Dr. Forstall's Medicare patients by sex, 2024
- Women19555%
- Men15745%
Chronic conditions among Dr. Forstall's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis62%
- Diabetes59%
- Chronic kidney disease58%
- Heart failure57%
- Ischemic heart disease57%
- Mood disorders54%
Share of Medicare patients with each condition. A patient can have several.
Dr. Forstall's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women47%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory J. Forstall wrote 988 Medicare Part D claims in 2024
In 2024, Dr. Forstall wrote 988 Medicare Part D claims for 289 patients. 83% of them were for generic drugs. CMS names the drug for 864 of them, across 27 drugs with 11 or more claims each, at $378,358 in total drug cost. In 2023, CMS named 830 claims across 27 drugs.
Dr. Forstall's Part D claims by kind of drug, 2024
- Generic820 claims83%
- Brand-name168 claims17%
Dr. Forstall's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Forstall's Part D claims, 2024
- Antibiotics73%718 of 988 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 8302024: 8644%
Drugs named by CMS: 27 in 2024, 27 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Gregory J. Forstall scored 82 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 82 out of 100 for Dr. Forstall for performance year 2024, reported as part of a group. Dr. Forstall accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Forstall as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Forstall's MIPS scores, performance year 2024
- 82of 100Final score
- 46.7of 100Quality
- 40of 100Improvement Activities
- 81of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Gregory J. Forstall received $66 in industry payments from 2019 to 2025
CMS Open Payments shows 4 general payments to Dr. Forstall from 3 drug and device companies from 2019 to 2025. Education make up the largest share, 69% of the total. Paratek Pharmaceuticals, Inc. paid the most, $24.
General payments to Dr. Forstall by program year, 2019 to 2025
General payments to Dr. Forstall by kind, 2019 to 2025
- Education$4669%
- Food and beverage$2031%
Companies that paid Dr. Forstall the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory J. Forstall graduated from Southern Illinois University School of Medicine
Dr. Forstall graduated from Southern Illinois University School of Medicine in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory J. Forstall's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory J. Forstall
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory J. Forstall's NPI number?
Dr. Gregory J. Forstall's NPI number is 1477642486. It was assigned on October 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory J. Forstall?
Dr. Gregory J. Forstall is an infectious disease specialist in Flint, Michigan. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. Gregory J. Forstall practice?
Dr. Forstall practices at 401 S Ballenger Hwy, Flint, MI 48532. Dr. Forstall's primary practice is McLaren Flint Hospital in Flint, Michigan. Dmand AI also links Dr. Forstall to 3 hospitals and 1 home health agency.
What is Dr. Gregory J. Forstall's office phone number?
The practice phone on file for Dr. Forstall is (810) 342-2000.
What is Dr. Gregory J. Forstall's medical license number?
Dr. Forstall holds Michigan license 4301061462.
Which hospitals is Dr. Gregory J. Forstall affiliated with?
Dr. Forstall is affiliated with McLaren Flint. Dmand AI links Dr. Forstall to 3 more hospitals.
What medical group is Dr. Gregory J. Forstall part of?
Dr. Forstall is linked to Gregory J. Forstall MD PC.
Does Dr. Gregory J. Forstall accept Medicare?
Yes. CMS data shows Dr. Forstall billed Medicare for 2,634 services in 2024, and Dr. Forstall accepts Medicare assignment.
Does Dr. Gregory J. Forstall offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Forstall as offering telehealth services.
What is Dr. Gregory J. Forstall's MIPS score?
Dr. Forstall's MIPS final score for performance year 2024 is 82 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Gregory J. Forstall see?
CMS counts 352 Medicare patients who saw Dr. Forstall in 2024, with an average age of 74.
What services does Dr. Gregory J. Forstall bill to Medicare?
In 2024, Dr. Forstall's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99222).
Where did Dr. Gregory J. Forstall go to medical school?
Dr. Forstall graduated from Southern Illinois University School of Medicine in 1987.
What drugs does Dr. Gregory J. Forstall prescribe most?
In 2024 Medicare Part D data, Dr. Forstall's most prescribed drugs by claims were Vancomycin HCl, Ceftriaxone and Amoxicillin-Clavulanate Potass.
Has Dr. Gregory J. Forstall received payments from drug or device companies?
CMS Open Payments shows $66 in general payments to Dr. Forstall from 3 companies from 2019 to 2025. The largest total came from Paratek Pharmaceuticals, Inc.
How long has Dr. Gregory J. Forstall been practicing?
Dr. Forstall graduated from medical school in 1987, 39 years ago.
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