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Dr. David P. Chamberlain, MD
NPI1861423071PAC ID0345262457
- Medicare services, 2024
- 6,411
- Medicare patients, 2024
- 419
- Part D claims, 2024
- 8,979
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 300 W Mercury St, Butte, MT 59701-1652
- Practice phone
- Call (406) 723-1300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mercury Street Medical Group
Primary care practice · Butte, Montana
Find Dr. Chamberlain's professional email, personal email and mobile number
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Dr. David P. Chamberlain is an internist in Butte, Montana
Dr. Chamberlain practices at Mercury Street Medical Group in Butte, Montana.
Dr. Chamberlain's NPI, 1861423071, was assigned on July 5, 2006. Dr. Chamberlain graduated from University of Missouri, Columbia School of Medicine in 1997. Dr. Chamberlain holds Montana license 9601.
NPI and contact details
- NPI
- 1861423071NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0345262457
- NPI enumeration date
- July 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (406) 723-1300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David P. Chamberlain practices at Mercury Street Medical Group in Butte, Montana
Dr. Chamberlain's primary practice is Mercury Street Medical Group, at 300 W Mercury St, Butte, MT 59701-1652. The practice phone is (406) 723-1300.
- Mercury Street Medical Group300 W Mercury St, Butte, MT 59701-1652Phone(406) 723-1300
Source: Dmand AI Affiliation Data
Dr. David P. Chamberlain is affiliated with 5 sites of care and 2 medical groups
Dr. Chamberlain's primary practice is Mercury Street Medical Group in Butte, Montana. Dr. Chamberlain is also affiliated with St. James Hospital. The medical group on file is SCL Health Medical Group - Butte. Dmand AI also links Dr. Chamberlain to 2 more home health agencies, 1 group practice or clinic and 1 medical group, each named with a free account.
Mercury Street Medical GroupPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. David P. Chamberlain's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chamberlain practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercury Street Medical Group | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David P. Chamberlain is one of 311 internists in Montana
Internal medicine is Dr. Chamberlain's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chamberlain is licensed in Montana.
Specialties and state licenses
- Internal medicine, MontanaPrimary
Internists near Dr. Chamberlain
Counts of internists 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. David P. Chamberlain billed Medicare for 6,411 services in 2024
CMS data shows 6,411 Medicare services from Dr. Chamberlain across 35 procedure codes in 2024, for 419 Medicare patients. Medicare paid $139,857 for them. Every service was in an office.
Medicare services, 20246,411
Medicare patients419
Paid by Medicare$139,857
Procedure codes35
Dr. Chamberlain's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 4,4182024: 4,2484%
- Surgery
- 2023: 8102024: 7349%
- Office and hospital visits
- 2023: 7862024: 68413%
- Other services
- 2023: 7112024: 6627%
- Tests and treatments
- 2023: 1312024: 8337%
- Imaging
- 2023: 142024: 0100%
Dr. Chamberlain compared with the Montana median for internists, 2024
- Dr. Chamberlain
- Montana median
- Medicare services
- 6,411vs 47613.5 times
- Medicare patients
- 419vs 25366% above
- Part D claims
- 8,337vs 14358.3 times
Medians across 340 internists in Montana with Dmand AI profiles that report each measure.
Dr. Chamberlain'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.
Need commercial claims for Dr. Chamberlain?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chamberlain and other internists in Montana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David P. Chamberlain treated 419 Medicare patients in 2024, average age 75
CMS counts 419 Medicare patients who saw Dr. Chamberlain in 2024. The largest group is 65 to 74, with 202 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 7% are also on Medicaid. Their average risk score is 1.06, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chamberlain's median patient age at 75, with 49% women.
Medicare patients, 2024419
Average age75
Average risk score1.06
Also on Medicaid7%
Dr. Chamberlain's Medicare patients by age, 2024
Dr. Chamberlain's Medicare patients by sex, 2024
- Women20148%
- Men21852%
Chronic conditions among Dr. Chamberlain's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis65%
- Depression27%
- Diabetes27%
- Mood disorders27%
- Chronic kidney disease23%
- Anxiety16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chamberlain'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
- Women49%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. David P. Chamberlain wrote 8,979 Medicare Part D claims in 2024
In 2024, Dr. Chamberlain wrote 8,979 Medicare Part D claims for 423 patients. 87% of them were for generic drugs. CMS names the drug for 8,337 of them, across 142 drugs with 11 or more claims each, at $575,252 in total drug cost. In 2023, CMS named 8,391 claims across 152 drugs.
Part D claims, 20248,979
Drugs named by CMS142
Total drug cost$575,252
Part D patients423
Dr. Chamberlain's Part D claims by kind of drug, 2024
- Generic7,837 claims87%
- Brand-name1,054 claims12%
- Other88 claims1%
Dr. Chamberlain'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. Chamberlain's Part D claims, 2024
- Opioids2%141 of 8,979 claims
- Antibiotics2%152 of 8,979 claims
- Antipsychotics, patients 65 and over0%27 of 8,979 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: 8,3912024: 8,3371%
Drugs named by CMS: 142 in 2024, 152 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
How Dr. David P. Chamberlain takes part in Medicare
Dr. Chamberlain 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. David P. Chamberlain has 1 publication on record
Dmand AI links 1 paper to Dr. Chamberlain in 2019. Dr. Chamberlain's most frequent co-author is Mikhail N. Kosiborod, MD.
Papers1
Dr. Chamberlain's most frequent co-authors
Recent publications by Dr. Chamberlain
See who Dr. Chamberlain researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chamberlain works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. David P. Chamberlain received $12,972 in industry payments from 2016 to 2025
CMS Open Payments shows 791 general payments to Dr. Chamberlain from 42 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 91% of the total. AstraZeneca Pharmaceuticals LP paid the most, $2,163.
General payments to Dr. Chamberlain by program year, 2016 to 2025
General payments to Dr. Chamberlain by kind, 2016 to 2025
$13Kin total
- Food and beverage$11,78891%
- Travel and lodging$1,1279%
- Education$580%
Companies that paid Dr. Chamberlain the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. David P. Chamberlain graduated from University of Missouri, Columbia School of Medicine
Dr. Chamberlain graduated from University of Missouri, Columbia School of Medicine in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. David P. Chamberlain'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 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. David P. Chamberlain
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. David P. Chamberlain's NPI number?
Dr. David P. Chamberlain's NPI number is 1861423071. It was assigned on July 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. David P. Chamberlain?
Dr. David P. Chamberlain is an internist in Butte, Montana. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. David P. Chamberlain practice?
Dr. Chamberlain practices at 300 W Mercury St, Butte, MT 59701-1652. Dr. Chamberlain's primary practice is Mercury Street Medical Group in Butte, Montana. Dmand AI also links Dr. Chamberlain to 2 home health agencies, 1 group practice or clinic and 1 medical group.
What is Dr. David P. Chamberlain's office phone number?
The practice phone on file for Dr. Chamberlain is (406) 723-1300.
What is Dr. David P. Chamberlain's medical license number?
Dr. Chamberlain holds Montana license 9601.
Which hospitals is Dr. David P. Chamberlain affiliated with?
Dr. Chamberlain is affiliated with St. James Hospital.
What medical group is Dr. David P. Chamberlain part of?
Dr. Chamberlain is linked to SCL Health Medical Group - Butte. Dmand AI links Dr. Chamberlain to 1 more medical group.
Does Dr. David P. Chamberlain accept Medicare?
Yes. CMS data shows Dr. Chamberlain billed Medicare for 6,411 services in 2024, and Dr. Chamberlain accepts Medicare assignment.
How many Medicare patients does Dr. David P. Chamberlain see?
CMS counts 419 Medicare patients who saw Dr. Chamberlain in 2024, with an average age of 75.
What services does Dr. David P. Chamberlain bill to Medicare?
In 2024, Dr. Chamberlain's most billed Medicare services were surgery: heart and blood vessels (36415), lab and pathology test (85025) and lab and pathology test (80048).
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Where did Dr. David P. Chamberlain go to medical school?
Dr. Chamberlain graduated from University of Missouri, Columbia School of Medicine in 1997.
What drugs does Dr. David P. Chamberlain prescribe most?
In 2024 Medicare Part D data, Dr. Chamberlain's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Amlodipine Besylate.
Has Dr. David P. Chamberlain received payments from drug or device companies?
CMS Open Payments shows $12,972 in general payments to Dr. Chamberlain from 42 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. David P. Chamberlain been practicing?
Dr. Chamberlain graduated from medical school in 1997, 29 years ago.
Does Dr. David P. Chamberlain do research?
Dmand AI links 1 publication to Dr. Chamberlain.
Who does Dr. David P. Chamberlain publish with?
Dr. Chamberlain's most frequent co-authors are Mikhail N. Kosiborod, MD (1 shared paper).
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