Karen Lynne Koumjian, OD
Optometrist · Watertown, MA
Karen Lynne Koumjian, OD is an optometrist with a practice address in Watertown, Massachusetts, and NPI 1134345689, issued on Apr 17, 2007. Check the license (Massachusetts 2921, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karen Lynne Koumjian
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 2921 MA
Self-reported in NPPES; status is on the state search - Practice location
- 124 Watertown St, Watertown, MA 02472
- Phone
- (617) 923-2761
- Enumerated
- Apr 17, 2007
- Record last updated
- Jun 30, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (617) 926-2835
- Medicaid ID
- 0342068 MA
- Medicare enrollment
- Enrolled (PECOS I20040810000646); accepts Medicare assignment
- Medical or professional school
- New England College Of Optometry, 1981
- Entity
- Type 1 · individual
8 nearest optometrist records → All 1,501 in Massachusetts → Look up another NPI →
Also registered at 124 Watertown St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Karen Lynne Koumjian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 2921Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average optometrist in 2024
78 Medicare Part D claims for 27 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 46% of claims.
Most prescribed
- Latanoprost21 claims
- Tobramycin-Dexamethasone17 claims
- Xdemvy17 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.
Industry payments in 2024: $460.22
20 payments; by number, the most common kind was food and beverage; the largest payer was Bausch & Lomb Americas Inc. The 34,453 providers of this specialty with any payment received $769.99 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.
Karen Lynne Koumjian among 1,501 optometrist records in Massachusetts
Karen Lynne Koumjian, OD is one of 1,501 optometrist records with a practice address in Massachusetts. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 47% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1981 · median 2008 among the 933 with a school on file
- Record last updated2016 · 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 152W00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 optometrist records list a practice address in Watertown
They are 8 of the 873 NPPES records with a practice address in Watertown, and 1,501 optometrist records in Massachusetts.
All 1,501 in Massachusetts → Every provider in Watertown → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Diane Ah-Kine Ng Poon Hing, O.D.Watertown, MA 024721285884395
- Joanne Caruso, ODWatertown, MA 024721629037734
- Peter Cottone, O.D.Watertown, MA 024721902945884
- Hannah Edward, O.D.Watertown, MA 024721447741962
- Malcolm Greene, O.D.Watertown, MA 024721649264318
- Martin Greene, ODWatertown, MA 024721154354025
- Barry Kran, ODWatertown, MA 024721124028592
- John Archibald, O.D.Arlington, MA 024741295729903
Common questions
What is Karen Lynne Koumjian, OD's NPI number?
Karen Lynne Koumjian, OD's National Provider Identifier (NPI) is 1134345689, issued on Apr 17, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Karen Lynne Koumjian, OD located?
The NPPES record lists a practice address at 124 Watertown St, Watertown, MA, 02472. Phone: (617) 923-2761. Providers update this record themselves, so call before visiting.
How can I verify Karen Lynne Koumjian, OD's license?
NPPES lists Massachusetts license number 2921, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Karen Lynne Koumjian, OD prescribe under Medicare Part D?
In 2024, Karen Lynne Koumjian, OD had 78 Medicare Part D claims for 27 beneficiaries; the average among optometrist prescribers was 277. 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.