Active NPI
Glaucoma Consultants of Washington, Inc.
- Ophthalmology Physician
- Herndon, VA
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Ophthalmology Physician
- License
- D53502
- Legal business name
- GLAUCOMA CONSULTANTS OF WASHINGTON, INC.
- Practice address
- 171 Elden St Ste 100
Herndon, VA 20170-4834 - Phone
- (703) 689-2020
- Fax
- (703) 485-1153
- NPI assigned
- Feb 25, 2008
- Last updated
- Jun 19, 2026
- Organization subpart
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Authorized official
- Name
- Dr. Sameer I Ahmad, MD
- Title
- Ceo/MD
- Phone
- (703) 689-2020
Authorized official NPPES reports the official by name only. The link goes to the one practitioner connected to this organization with that name.
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Ophthalmology Physician | 207W00000X | D53502 | MD | Primary |
Addresses
Primary practice location
171 Elden St Ste 100
Herndon, VA 20170-4834
Mailing address
PO Box 465
Herndon, VA 20172-0465
Phone (703) 689-2020
Other practice location 1
131 Elden St Ste 201
Herndon, VA 20170-4876
Phone (703) 689-2020
Other practice location 2
6101 Redwood Square Ctr Ste 201
Centreville, VA 20121-4265
Phone (703) 689-2020
Other practice location 3
142 Linden Dr Ste 107
Winchester, VA 22601-6901
Phone (703) 689-2020
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in DC, VA
Enrollment records 2
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| O20081105000239 | DC | Part B Supplier - Clinic/Group Practice | 1153497821 |
Receives reassigned benefits from 5 practitioners 1 other NPI on this enrollment Practice locations: Centreville, VA; Herndon, VA |
| O20090414000324 | VA | Part B Supplier - Clinic/Group Practice | 1153497821 |
Receives reassigned benefits from 6 practitioners 2 other NPIs on this enrollment Practice locations: Winchester, VA |
Other NPIs on the same Medicare enrollment 3
NPIs listed together on one Medicare enrollment, typically parts of the same organization.
-
- Ophthalmology Physician
- Winchester, VA
- NPI 1992974950
O20090414000324
-
- Ophthalmology Physician
- Herndon, VA
- NPI 1073782777
O20090414000324
-
- Ophthalmology Physician
- Silver Spring, MD
- NPI 1407028962
O20081105000239
National Provider Directory
National Provider Directory- Tax ID family
- Glaucoma Consultants of Washington
Other organizations with this tax ID 4
Organizations that report the same tax identification number in the National Provider Directory.
-
- Ophthalmology Physician
- Winchester, VA
- NPI 1992974950
-
- Ophthalmology Physician
- Herndon, VA
- NPI 1073782777
-
- Ophthalmology Physician
- Easton, MD
- NPI 1083883789
-
- Ophthalmology Physician
- Silver Spring, MD
- NPI 1407028962
Locations
8630 Fenton St
#7
Silver Spring, MD 20910
Phone (240) 804-1234
21785 Filigree Ct
Ste 202
Ashburn, VA 20147
Phone (703) 232-1717
5900 Fort Dr
Ste 410
Centreville, VA 20121
Phone (703) 689-2020
142 Linden Dr
Winchester, VA 22601
Phone (540) 722-7282
142 Linden Dr
Ste 107
Winchester, VA 22601
Phone (703) 689-2020
1870 Amherst St
Ste A
Winchester, VA 22601
Practitioners & affiliated clinicians
Practitioners 6
Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1203897600000",
"enumeration_type": "NPI-2",
"last_updated_epoch": "1781827200000",
"number": "1962671818",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 465",
"city": "HERNDON",
"state": "VA",
"postal_code": "201720465",
"telephone_number": "703-689-2020",
"fax_number": "703-563-3769"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "171 ELDEN ST STE 100",
"city": "HERNDON",
"state": "VA",
"postal_code": "201704834",
"telephone_number": "703-689-2020",
"fax_number": "703-485-1153"
}
],
"practiceLocations": [
{
"address_1": "131 Elden St Ste 201",
"address_purpose": "LOCATION",
"city": "Herndon",
"state": "VA",
"postal_code": "201704876",
"country_code": "US",
"telephone_number": "703-689-2020",
"fax_number": "703-563-3769",
"country_name": "United States",
"address_type": "DOM"
},
{
"address_1": "6101 Redwood Square Ctr Ste 201",
"address_purpose": "LOCATION",
"city": "Centreville",
"state": "VA",
"postal_code": "201214265",
"country_code": "US",
"telephone_number": "703-689-2020",
"fax_number": "703-563-3769",
"country_name": "United States",
"address_type": "DOM"
},
{
"address_1": "142 Linden Dr Ste 107",
"address_purpose": "LOCATION",
"city": "Winchester",
"state": "VA",
"postal_code": "226016901",
"country_code": "US",
"telephone_number": "703-689-2020",
"fax_number": "703-563-3769",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"organization_name": "GLAUCOMA CONSULTANTS OF WASHINGTON, INC.",
"organizational_subpart": "NO",
"enumeration_date": "2008-02-25",
"last_updated": "2026-06-19",
"certification_date": "2026-06-19",
"status": "A",
"authorized_official_last_name": "AHMAD",
"authorized_official_first_name": "SAMEER",
"authorized_official_middle_name": "I",
"authorized_official_title_or_position": "CEO/MD",
"authorized_official_telephone_number": "703-689-2020",
"authorized_official_name_prefix": "Dr.",
"authorized_official_credential": "MD"
},
"taxonomies": [
{
"code": "207W00000X",
"taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
"desc": "Ophthalmology",
"state": "MD",
"license": "D53502",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Herndon, VA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 19, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.