W. D. MCCALLUM, M.D., INC.
W. D. MCCALLUM, M.D., INC. is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1053592733, based in Mountain View, CA. It is classified under Maternal & Fetal Medicine Physician.
Getting there
The practice address on file is 1580 W EL CAMINO REAL SUITE 1, Mountain View, CA 94040. 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 |
|---|---|---|
| GR0104720 | CA | Maternal & Fetal Medicine Physician primary |
This provider holds licence GR0104720 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Maternal & Fetal Medicine covers
An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies. NUCC Health Care Provider Taxonomy, code 207VM0101X
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1053592733 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Nov 21, 2007 |
| Last updated | Nov 21, 2007 |
| Status | Active |
| Practice address |
1580 W EL CAMINO REAL SUITE 1 Mountain View, CA 94040 (650) 964-1505 Fax (650) 964-1522 |
| Other identifiers |
00G212400
(CA) 00A305370 (CA) |
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 | 5 | 3 | 5 | 9 | 2 | 7 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 1 | 3 | 1 | 9 | 4 | 7 | 6 |
Sum = 57 · next multiple of 10 = 60 · check digit = 3 · actual last digit = 3
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.