Dr. Forrest Robert Hamlin Sr., DO
- Medicare services, 2024
- 719
- Medicare patients, 2024
- 273
- Part D claims, 2024
- 197
- Hospital affiliations
- 2
- Medical groups
- 2
- Practice address
- 2800 10th Ave N, Billings, MT 59101
- Practice phone
- Call (406) 657-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hamlin's professional email, personal email and mobile number
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Dr. Forrest Robert Hamlin Sr. is a general practice physician in Billings, Montana
Dr. Hamlin practices at Billings Clinic Hospital in Billings, Montana, part of Billings Clinic.
Dr. Hamlin's NPI, 1225558349, was assigned on June 20, 2017. Dr. Hamlin graduated from Michigan State University College of Osteopathic Medicine in 2017. Dr. Hamlin holds California license 17023.
- NPI
- 1225558349NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6608251525
- NPI enumeration date
- June 20, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (406) 657-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Forrest Robert Hamlin Sr. practices at Billings Clinic Hospital in Billings, Montana
Dr. Hamlin's primary practice is Billings Clinic Hospital, at 2800 10th Ave N, Billings, MT 59101 in Yellowstone County. The practice phone is (406) 657-4000.
- Billings Clinic Hospital2800 10th Ave N, Billings, MT 59101 · Yellowstone CountyPhone(406) 657-4000
Source: Dmand AI Affiliation Data
Dr. Forrest Robert Hamlin Sr. is affiliated with 2 sites of care and 2 medical groups
Dr. Hamlin's primary practice is Billings Clinic Hospital in Billings, Montana, part of Billings Clinic. Dr. Hamlin is also affiliated with Eastern Idaho Regional Medical Center. The medical group on file is Billings Clinic. Dmand AI also links Dr. Hamlin to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Forrest Robert Hamlin Sr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hamlin practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Billings Clinic Hospital | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Billings Clinic and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Forrest Robert Hamlin Sr. is one of 32 general practice physicians in Montana
General practice is Dr. Hamlin's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dmand AI has Dr. Hamlin's licenses on file in 2 states: California and Idaho.
Specialties and state licenses
- General practice, CaliforniaPrimary
- Family medicine, Idaho
General practice physicians near Dr. Hamlin
Counts of general practice physicians 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. Forrest Robert Hamlin Sr. billed Medicare for 719 services in 2024
CMS data shows 719 Medicare services from Dr. Hamlin across 6 procedure codes in 2024, for 273 Medicare patients. Medicare paid $58,226 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hamlin's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2912024: 704142%
- Other services
- 2023: 02024: 15
Dr. Hamlin compared with the Montana median for general practice physicians, 2024
- Dr. Hamlin
- Montana median
- Medicare services
- 719vs 1554.6 times
- Part D claims
- 39vs 17878% below
Medians across 30 general practice physicians in Montana with Dmand AI profiles that report each measure.
Dr. Hamlin'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Forrest Robert Hamlin Sr. treated 273 Medicare patients in 2024, average age 75
CMS counts 273 Medicare patients who saw Dr. Hamlin in 2024. The largest group is 75 to 84, with 108 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 24% are also on Medicaid. Their average risk score is 1.94, 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. Hamlin's median patient age at 75, with 51% women.
Dr. Hamlin's Medicare patients by age, 2024
Dr. Hamlin's Medicare patients by sex, 2024
- Women13851%
- Men13549%
Chronic conditions among Dr. Hamlin's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis52%
- Diabetes47%
- Chronic kidney disease45%
- Ischemic heart disease45%
- Heart failure41%
- Mood disorders41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hamlin's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Forrest Robert Hamlin Sr. wrote 197 Medicare Part D claims in 2024
In 2024, Dr. Hamlin wrote 197 Medicare Part D claims for 70 patients. 88% of them were for generic drugs. CMS names the drug for 39 of them, across 3 drugs with 11 or more claims each, at $8,881 in total drug cost.
Dr. Hamlin's Part D claims by kind of drug, 2024
- Generic174 claims88%
- Brand-name23 claims12%
Dr. Hamlin'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. Hamlin's Part D claims, 2024
- Antibiotics12%24 of 197 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
How Dr. Forrest Robert Hamlin Sr. takes part in Medicare
Dr. Hamlin accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Forrest Robert Hamlin Sr. graduated from Michigan State University College of Osteopathic Medicine
Dr. Hamlin graduated from Michigan State University College of Osteopathic Medicine in 2017.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Forrest Robert Hamlin Sr.'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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) |
| 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. Forrest Robert Hamlin Sr.
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. Forrest Robert Hamlin Sr.'s NPI number?
Dr. Forrest Robert Hamlin Sr.'s NPI number is 1225558349. It was assigned on June 20, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Forrest Robert Hamlin Sr.?
Dr. Forrest Robert Hamlin Sr. is a general practice physician in Billings, Montana. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Forrest Robert Hamlin Sr. practice?
Dr. Hamlin practices at 2800 10th Ave N, Billings, MT 59101. Dr. Hamlin's primary practice is Billings Clinic Hospital in Billings, Montana, part of Billings Clinic. Dmand AI also links Dr. Hamlin to 1 medical group.
What is Dr. Forrest Robert Hamlin Sr.'s office phone number?
The practice phone on file for Dr. Hamlin is (406) 657-4000.
What is Dr. Forrest Robert Hamlin Sr.'s medical license number?
Dr. Hamlin holds California license 17023, one of the licenses on file in 2 states.
Which states has Dr. Forrest Robert Hamlin Sr. been licensed in?
Dmand AI has state licenses on file for Dr. Hamlin in California and Idaho.
Which hospitals is Dr. Forrest Robert Hamlin Sr. affiliated with?
Dr. Hamlin practices at Billings Clinic Hospital in Billings, Montana. Dr. Hamlin is also affiliated with Eastern Idaho Regional Medical Center.
What medical group is Dr. Forrest Robert Hamlin Sr. part of?
Dr. Hamlin is linked to Billings Clinic. Dmand AI links Dr. Hamlin to 1 more medical group.
Does Dr. Forrest Robert Hamlin Sr. accept Medicare?
Yes. CMS data shows Dr. Hamlin billed Medicare for 719 services in 2024, and Dr. Hamlin accepts Medicare assignment.
How many Medicare patients does Dr. Forrest Robert Hamlin Sr. see?
CMS counts 273 Medicare patients who saw Dr. Hamlin in 2024, with an average age of 75.
Show 4 more questionsShow fewer questions
What services does Dr. Forrest Robert Hamlin Sr. bill to Medicare?
In 2024, Dr. Hamlin's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and hospital inpatient care (99239).
Where did Dr. Forrest Robert Hamlin Sr. go to medical school?
Dr. Hamlin graduated from Michigan State University College of Osteopathic Medicine in 2017.
What drugs does Dr. Forrest Robert Hamlin Sr. prescribe most?
In 2024 Medicare Part D data, Dr. Hamlin's most prescribed drugs by claims were Atorvastatin Calcium, Amoxicillin-Clavulanate Potass and Eliquis.
How long has Dr. Forrest Robert Hamlin Sr. been practicing?
Dr. Hamlin graduated from medical school in 2017, 9 years ago.
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