JAMES W UMLAS MD
NPI 1942268883
Ophthalmology in Lexington, MA
About James W Umlas Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JAMES W UMLAS MD (NPI 1942268883) is an individual ophthalmology provider in Lexington, Massachusetts, licensed in Massachusetts (78623) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Harvard Medical School (1992).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
James W Umlas Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show James Umlas reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Lexington, MA 02421
- Reassigned Medicare billing, Massachusetts enrollment
- 37 clinicians in this Medicare group
Lexington, MA 02421
- Reassigned Medicare billing, Massachusetts enrollment
- 39 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 11
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02421 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LEXINGTON, MA 02421
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is James Umlas's NPI number?
The NPI number for James Umlas is 1942268883. It was assigned to this individual provider in the NPPES registry on May 2, 2006.
Where is James Umlas located?
James Umlas practices at 21 Worthen Rd, Lexington, MA 02421. The listed phone number is (781) 862-1620.
What is James Umlas's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is James Umlas enrolled in Medicare?
Yes. James Umlas is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for James Umlas's services?
According to the CMS Revalidation Reassignment List (October 2026 release), James Umlas reassigns Medicare benefits to 2 organizations: Lexington Eye Associates - Bid (Lexington, MA) and Lexington Eye Associates, Inc (Lexington, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for James Umlas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does James Umlas accept?
Health plans from Anthem Blue Cross and Blue Sheld, Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and Blue Cross and Blue Shield of Texas and 2 other insurers list James Umlas as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for James Umlas was last updated on June 17, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# James W Umlas, MD · NPI 1942268883
Ophthalmology physician in Lexington, Massachusetts. Individual provider, active in the CMS NPPES registry since May 2, 2006.
## Identity
- **NPI:** 1942268883 (Entity type: Individual)
- **Enumerated:** May 2, 2006
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** 78623 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 21 WORTHEN RD, Lexington, MA 02421-4835
- **Phone:** (781) 862-1620
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Lexington Eye Associates - Bid (NPI 1801204714, Lexington, MA); Lexington Eye Associates, Inc (NPI 1467502757, Lexington, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 1992
## Record status
- **NPPES last updated:** June 17, 2008
- **Other identifiers:** Medicaid 3161242 (MA); Medicare PIN NX2561 (MA); Medicare UPIN G02253 (MA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1942268883) · Data from the CMS NPPES public registry.