Active NPI
Howard Louis Hartz, O.D.
- Optometrist
- Timonium, MD
National Provider Identifier
1548200314
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Optometrist
- License
- TAO989
- Practice address
- 1952 York Rd
Timonium, MD 21093-4226 - Phone
- (410) 308-3162
- Fax
- (410) 308-3190
- NPI assigned
- Jun 8, 2006
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Optometrist | 152W00000X | TAO989 | MD | Primary |
Addresses
Primary practice location
1952 York Rd
Timonium, MD 21093-4226
Mailing address
25 Bellchase CT
Baltimore, MD 21208-1300
Phone (410) 484-7019
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in MD
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: No
- Hospice: Yes
Enrollment records 1
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20140505001737 | MD | Practitioner - Optometry | 0143453878 | Practice locations: Timonium, MD |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| TAO989 | MD | MD | Optometrist |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1149724800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1548200314",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "25 BELLCHASE CT",
"city": "BALTIMORE",
"state": "MD",
"postal_code": "212081300",
"telephone_number": "410-484-7019",
"fax_number": "410-484-9527"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1952 YORK RD",
"city": "TIMONIUM",
"state": "MD",
"postal_code": "210934226",
"telephone_number": "410-308-3162",
"fax_number": "410-308-3190"
}
],
"practiceLocations": [],
"basic": {
"last_name": "HARTZ",
"first_name": "HOWARD",
"middle_name": "LOUIS",
"name_prefix": "Dr.",
"credential": "O.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-06-08",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "152W00000X",
"taxonomy_group": "",
"desc": "Optometrist",
"state": "MD",
"license": "TAO989",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Timonium, MD
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.