Denise G. Aldahl, MD
Obstetrics & Gynecology Physician · Sierra Madre, CA
Denise G. Aldahl, MD is an obstetrics & gynecology physician with a practice address in Sierra Madre, California, and NPI 1174746804, issued on Apr 11, 2007. Check the license (California G73120, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Denise G. Aldahl
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G73120 CA
Self-reported in NPPES; status is on the state search - Practice location
- 147 W Sierra Madre Blvd, Sierra Madre, CA 91024
- Phone
- (626) 355-3443
- Enumerated
- Apr 11, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (626) 355-7843
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 147 W Sierra Madre Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jossalyn Emslie, M.D.Family Medicine Physician1013913508
- Lorraine Gray, R.D.Registered Dietitian1881035913
- Phuong Nguyen, DOInternal Medicine Physician1336609908
- Florizza ReyesFamily Nurse Practitioner1235803545
- Hani Sami, MDInternal Medicine Physician1306891957
- Nathalie Sami, MDInternal Medicine Physician1902487622
Verify Denise G. Aldahl in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G73120Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Denise G. Aldahl among 5,088 obstetrics & gynecology physician records in California
Denise G. Aldahl, MD is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 38% newer
- In a Medicare fileNo · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2007 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 5,088 in California → Every provider in Sierra Madre → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Polieno Cespon, MDSouth Pasadena, CA 910301427125871
- Bente Kaiser-Osugi, MDSouth Pasadena, CA 910301396825865
- Jasmine Fernandez, MDMonrovia, CA 910161730822032
- Vinita Popat, MDDuarte, CA 910101194354076
- Ana Tergas, MDDuarte, CA 910101326346065
- Jessica Valdez, M.D., MPHDuarte, CA 910101730829573
- Megan Gau, M.D., M.H.S.Arcadia, CA 910071669908265
- Marie Johnson, D.O.Arcadia, CA 910071962898254
Common questions
What is Denise G. Aldahl, MD's NPI number?
Denise G. Aldahl, MD's National Provider Identifier (NPI) is 1174746804, issued on Apr 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Denise G. Aldahl, MD located?
The NPPES record lists a practice address at 147 W Sierra Madre Blvd, Sierra Madre, CA, 91024. Phone: (626) 355-3443. Providers update this record themselves, so call before visiting.
How can I verify Denise G. Aldahl, MD's license?
NPPES lists California license number G73120, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.