Karin Ingrid Hjalmarson, MD
Internal Medicine Physician · Chestnut Hill, MA
Karin Ingrid Hjalmarson, MD is an internal medicine physician with a practice address in Chestnut Hill, Massachusetts, and NPI 1811987225, issued on Oct 26, 2005. Check the license (Massachusetts 224129, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Karin Ingrid Hjalmarson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 224129 MA
ME109711 FL
Self-reported in NPPES; status is on the state search - Practice location
- 822 Boylston St, Chestnut Hill, MA 02467
- Phone
- (617) 396-8866
- Enumerated
- Oct 26, 2005
- Record last updated
- Nov 10, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (617) 505-6102
- Medicaid ID
- 2104857 MA
- Medicare enrollment
- Enrolled (PECOS I20050712000797); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 822 Boylston St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tammy Boecher, MSN, RN,CSAdult Health Nurse Practitioner1639216138
- Benjamin Caplan, M.D.Family Medicine Physician1962722637
- Paul Glazer, M.D.Orthopaedic Surgery of the Spine Physician1750321287
- Barbara Kellman, LCSWClinical Social Worker1699300988
- Vincent Paquette, M.D.Internal Medicine Physician1851385389
- Joseph Upton, M.D.Plastic and Reconstructive Surgery Physician1376542191
Verify Karin Ingrid Hjalmarson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 224129Check 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% more Medicare Part D claims than the average internal medicine physician in 2024
4,724 Medicare Part D claims for 439 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 58 claims were for opioids.
Most prescribed
- Atorvastatin Calcium469 claims
- Amlodipine Besylate302 claims
- Levothyroxine Sodium254 claims
- Lisinopril224 claims
- Hydrochlorothiazide160 claims
- Metoprolol Succinate154 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.
Bills Medicare through 2 group practices
- Mass General Brigham Medical Group Suburban Massachusetts IncWellesley, MA
- Select Rehabilitation, LLCGlenview, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karin Ingrid Hjalmarson among 6,825 internal medicine physician records in Massachusetts
Karin Ingrid Hjalmarson, MD is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% 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, 88% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2001 · median 2004 among the 4,103 with a school on file
- Record last updated2015 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
65 internal medicine physician records list a practice address in Chestnut Hill
They are 65 of the 772 NPPES records with a practice address in Chestnut Hill, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Chestnut Hill → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- George Alliegro, MDChestnut Hill, MA 024671548226293
- Edith Braun, M.D.Chestnut Hill, MA 024671538130422
- Elizabeth Dupuis, M.D.Chestnut Hill, MA 024671255317061
- Thomas Faldetta, M.D.Chestnut Hill, MA 024671740254465
- Harold Greenspan, M.D.Chestnut Hill, MA 024671457326076
- Laurie Katzman, MDChestnut Hill, MA 024671881650125
- Lilian Mahrokhian, MDChestnut Hill, MA 024671679568679
- Malina Milan, M.D.Chestnut Hill, MA 024671548257744
Common questions
What is Karin Ingrid Hjalmarson, MD's NPI number?
Karin Ingrid Hjalmarson, MD's National Provider Identifier (NPI) is 1811987225, issued on Oct 26, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Karin Ingrid Hjalmarson, MD located?
The NPPES record lists a practice address at 822 Boylston St, Chestnut Hill, MA, 02467. Phone: (617) 396-8866. Providers update this record themselves, so call before visiting.
How can I verify Karin Ingrid Hjalmarson, MD's license?
NPPES lists Massachusetts license number 224129, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karin Ingrid Hjalmarson, MD prescribe under Medicare Part D?
In 2024, Karin Ingrid Hjalmarson, MD had 4,724 Medicare Part D claims for 439 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.