Quick answers
- Does Gagan J. Singh accept Medicare assignment?
- Yes. Medicare's clinician data says Gagan J. Singh accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Gagan J. Singh see?
- In 2024, CMS data shows 1,081 Original Medicare patients and 11,396 services for Gagan J. Singh. This counts Original Medicare only and measures volume, not quality.
- What is Gagan J. Singh's NPI number?
- 1881651743. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Gagan J. Singh, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 1,081 |
|---|---|
| Services billed to Medicare | 11,396 |
| Different services or procedures | 44 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Measurement of retinal and optic nerve function (92273)2,303 services
- Imaging of retina (92134)1,704 services
- Extended exam involving color vision testing (92283)1,624 services
- Established patient complete exam of visual system (92014)690 services
- Measurement of corneal curvature and depth of eye (92136)625 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Diabetes40%
- Ischemic heart disease26%
- Anxiety21%
Hospitals where Gagan J. Singh works
Medicare's Facility Affiliation Data lists Gagan J. Singh at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Jefferson Medical CenterRanson, WV · Critical Access Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 511319
Practice locations
Addresses where Gagan J. Singh is enrolled with Medicare (CMS data updated October 2, 2026).
- 12800 Middlebrook Rd, Suite 102Germantown, MD 20874 (301) 528‑4500
- 45 Thomas Johnson DrFrederick, MD 21702 (304) 725‑2121
- 710 Somerset Blvd, Suite 101Charles Town, WV 25414 (304) 725‑2121
Group practices
Medicare enrollment lists Gagan J. Singh as a member of this group (CMS data updated October 2, 2026).
- GMS Medical Eye Center, LLC2 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Germantown
Clinicians with the same Medicare primary specialty in Germantown, MD — not a recommendation.
Other clinicians in GMS Medical Eye Center, LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Howard University College Of Medicine |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881651743 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians