Ann Marqueling, MD
Ann Marqueling, MD is a Pediatric Dermatology Physician in Palo Alto, CA, registered under NPI 1932379088. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 725 WELCH RD, Palo Alto, CA 94304. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| A102492 | CA | Pediatric Dermatology Physician primary |
| A102492 | CA | Dermatology Physician |
| A102492 | CA | Pediatrics Physician |
This provider holds licence A102492 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
- 5193977841
- Enrollment ID
- I20121204000430
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 Pediatric Dermatology covers
A pediatric dermatologist has, through additional special training, developed expertise in the treatment of specific skin disease categories with emphasis on those diseases which predominate in infants, children and adolescents. NUCC Health Care Provider Taxonomy, code 207NP0225X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207NP0225X | Pediatric Dermatology Physician Pediatric Dermatology | A102492 | CA | primary |
| 207N00000X | Dermatology Physician | A102492 | CA | |
| 208000000X | Pediatrics Physician | A102492 | CA |
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 | 1932379088 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 5, 2008 |
| Last updated | Apr 16, 2024 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
725 WELCH RD Palo Alto, CA 94304 (650) 497-8000 |
| Mailing address |
770 WELCH RD SUITE 300 Palo Alto, CA 94304 |
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 | 9 | 3 | 2 | 3 | 7 | 9 | 0 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 6 | 2 | 6 | 7 | 9 | 0 | 7 |
Sum = 72 · next multiple of 10 = 80 · check digit = 8 · actual last digit = 8
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.