Jonathan Okman, M.D.
Jonathan Okman, M.D. is a Dermatology Physician in Hercules, CA, registered under NPI 1003227372.
Getting there
Here is what surrounds this office in Hercules, based on OpenStreetMap data collected Aug 28, 2026. Parking is available about 0.23 mi away. There is EV charging 0.23 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 0.20 mi away, served by 825 Alfred Nobel Drive. If you arrive early, there is a coffee shop 0.40 mi away.
Getting here and what is nearby
Transit Alfred Nobel Drive & John Muir Parkway 20 ft ~1 min
Transit Alfred Nobel Drive & John Muir Parkway 73 ft ~1 min
Parking 247 ft ~1 min
Transit 825 Alfred Nobel Drive 0.20 mi ~4 min
Parking 0.20 mi ~5 min
EV charging 0.23 mi ~5 min
Parking 0.23 mi ~5 min
Grocery Safeway 0.26 mi ~6 min
Coffee Peet's Coffee 0.31 mi ~7 min
Convenience Safeway Convenience Store 0.33 mi ~7 min
Gas station Safeway Fuel Station 0.34 mi ~7 min
Gas station Shell 0.36 mi ~8 min
Coffee Starbucks 0.40 mi ~8 min
Restaurant Jack in the Box 0.40 mi ~9 min
Restaurant Extreme Pizza 0.40 mi ~9 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| A137860 | CA | Dermatology Physician primary |
This provider holds licence A137860 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Dermatology
- PAC ID
- 3577813799
- Enrollment ID
- I20180910003000
Medicare enrolment is recorded as approved under the provider type Practitioner - Dermatology. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Dermatology covers
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging. NUCC Health Care Provider Taxonomy, code 207N00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003227372 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 8, 2014 |
| Last updated | May 19, 2022 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | M.D. |
| Practice address |
500 ALFRED NOBEL DR STE 245 Hercules, CA 94547 (510) 741-7418 Fax (510) 741-7456 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 2 | 2 | 7 | 3 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 2 | 5 | 3 | 5 |
Sum = 48 · next multiple of 10 = 50 · check digit = 2 · actual last digit = 2
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.