Catherine Jean Chamberlain, M.D.
Family Medicine Physician · Baltimore, MD
Catherine Jean Chamberlain, M.D. is a family medicine physician with a practice address in Baltimore, Maryland, and NPI 1083031199, issued on Mar 26, 2014. Check the license (Maryland D82835, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Catherine Jean Chamberlain
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- D82835 MD
Self-reported in NPPES; status is on the state search - Practice location
- 3700 Fleet St Ste 200, Baltimore, MD 21224
- Phone
- (410) 558-4700
- Enumerated
- Mar 26, 2014
- Record last updated
- Apr 3, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (410) 522-5070
- Medicare enrollment
- Enrolled (PECOS I20170720000535); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 1,912 in Maryland → Look up another NPI →
Also registered at 3700 Fleet St Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Catherine Jean Chamberlain in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D82835Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% fewer Medicare Part D claims than the average family medicine physician in 2024
1,808 Medicare Part D claims for 131 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Amlodipine Besylate127 claims
- Atorvastatin Calcium119 claims
- Buprenorphine-Naloxone98 claims
- Lisinopril86 claims
- Hydrochlorothiazide77 claims
- Levothyroxine Sodium58 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): 86.8 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: $508.55
8 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 55,478 providers of this specialty with any payment received $902.55 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
- Baltimore Medical System, Inc.Baltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Catherine Jean Chamberlain among 1,912 family medicine physician records in Maryland
Catherine Jean Chamberlain, M.D. is one of 1,912 family medicine physician records with a practice address in Maryland. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 75% of them.
- NPI issued2014 · 75% of these records are older, 23% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2014 · median 2004 among the 1,141 with a school on file
- Record last updated2020 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in Maryland
There are 1,912 family medicine physician records in Maryland.
All 1,912 in Maryland → Every provider in Baltimore → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Elizabeth Crowley, MDBaltimore, MD 212241255374310
- Hamid Ehsani-Shishvan, MDBaltimore, MD 212241720157647
- Natelaine Fripp, MDBaltimore, MD 212241205970241
- Jessica Jacobs, MDBaltimore, MD 212241154557171
- Henry Kakembo, M.D.Baltimore, MD 212241558301234
- Barbara Kalazny, MDBaltimore, MD 212241477629624
- Lisa Lacarrubba, M.D.Baltimore, MD 212241962589432
- Priya Little, M.D.Baltimore, MD 212241740511468
Common questions
What is Catherine Jean Chamberlain, M.D.'s NPI number?
Catherine Jean Chamberlain, M.D.'s National Provider Identifier (NPI) is 1083031199, issued on Mar 26, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Catherine Jean Chamberlain, M.D. located?
The NPPES record lists a practice address at 3700 Fleet St Ste 200, Baltimore, MD, 21224. Phone: (410) 558-4700. Providers update this record themselves, so call before visiting.
How can I verify Catherine Jean Chamberlain, M.D.'s license?
NPPES lists Maryland license number D82835, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Catherine Jean Chamberlain, M.D. prescribe under Medicare Part D?
In 2024, Catherine Jean Chamberlain, M.D. had 1,808 Medicare Part D claims for 131 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Catherine Jean Chamberlain, M.D.'s MIPS final score?
The 2023 MIPS final score is 86.8 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.