Katrina Klaus, D.O.
Internal Medicine Physician · Wellesley, MA
Katrina Klaus, D.O. is an internal medicine physician with a practice address in Wellesley, Massachusetts, and NPI 1295841427, issued on Aug 21, 2006. Check the license (Massachusetts 230582, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Katrina Klaus
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 230582 MA
RT 1326 NH
Self-reported in NPPES; status is on the state search - Practice location
- 230 Worcester St, Wellesley, MA 02481
- Phone
- (781) 431-5420
- Enumerated
- Aug 21, 2006
- Record last updated
- Nov 16, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (781) 431-5465
- Medicaid ID
- 2135086 MA
- Medicare enrollment
- Enrolled (PECOS I20080715000569); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 2004
- 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 230 Worcester St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susan Adamson, NPFamily Nurse Practitioner1316916604
- Dea Angiolillo, M.D.Internal Medicine Physician1649241985
- Eukeria Asamoah, PMHNPPsychiatric/Mental Health Nurse Practitioner1801596341
- Christine Baker, LMHCMental Health Counselor1992120893
- Mary Barker, M.D.Internal Medicine Physician1215908132
- Kalina Bergmann, PA-CInternal Medicine Physician1083549661
Verify Katrina Klaus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 230582Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,949 Medicare Part D claims for 243 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 71 claims were for opioids.
Most prescribed
- Atorvastatin Calcium97 claims
- Levothyroxine Sodium68 claims
- Metformin Hcl Er66 claims
- Omeprazole62 claims
- Lisinopril55 claims
- Famotidine52 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 one group practice
- Atrius Health IncWellesley, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katrina Klaus among 6,825 internal medicine physician records in Massachusetts
Katrina Klaus, D.O. 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 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2004 · median 2004 among the 4,103 with a school on file
- Record last updated2020 · 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).
81 internal medicine physician records list a practice address in Wellesley
They are 81 of the 1,117 NPPES records with a practice address in Wellesley, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Wellesley → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mitchell Abramson, M.D.Wellesley Hills, MA 024811417952284
- Dea Angiolillo, M.D.Wellesley, MA 024811649241985
- Mary Barker, M.D.Wellesley, MA 024811215908132
- Peter Britton, M.D.Wellesley, MA 024811184695082
- Mary Brogan, M.D.Wellesley, MA 024811912987454
- Carol Burd, M.D.Wellesley, MA 024811114998036
- Nancy Corliss, MDWellesley, MA 024811699763482
- Steven Flier, M.D.Wellesley, MA 024811013905751
Common questions
What is Katrina Klaus, D.O.'s NPI number?
Katrina Klaus, D.O.'s National Provider Identifier (NPI) is 1295841427, issued on Aug 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Katrina Klaus, D.O. located?
The NPPES record lists a practice address at 230 Worcester St, Wellesley, MA, 02481. Phone: (781) 431-5420. Providers update this record themselves, so call before visiting.
How can I verify Katrina Klaus, D.O.'s license?
NPPES lists Massachusetts license number 230582, 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 Katrina Klaus, D.O. prescribe under Medicare Part D?
In 2024, Katrina Klaus, D.O. had 1,949 Medicare Part D claims for 243 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.