Nathaniel M. Pack, PSY.D.
Clinical Psychologist · Palo Alto, CA
Nathaniel M. Pack, PSY.D. is a clinical psychologist with a practice address in Palo Alto, California, and NPI 1437483518, issued on Sep 23, 2009. Check the license (California PSY22991, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Nathaniel M. Pack
- Credential
- PSY.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- PSY22991 CA
Self-reported in NPPES; status is on the state search - Practice location
- 117 S California Ave, Palo Alto, CA 94306
- Phone
- (415) 847-6960
- Enumerated
- Sep 23, 2009
- Record last updated
- Jun 10, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (650) 600-8682
- Medicare enrollment
- Enrolled (PECOS I20100517000306); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 12,647 in California → Look up another NPI →
Also registered at 117 S California Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Benjamin Page, PSY.D.Clinical Psychologist1629407267
Verify Nathaniel M. Pack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PSY22991Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Sutter Bay Medical FoundationPalo Alto, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathaniel M. Pack among 12,647 clinical psychologist records in California
Nathaniel M. Pack, PSY.D. is one of 12,647 clinical psychologist records with a practice address in California. 9% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 49% of them.
- NPI issued2009 · 49% of these records are older, 46% newer
- In a Medicare fileYes · 9% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated2006 · median 2006 among the 2,424 with a school on file
- Record last updated2014 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
238 clinical psychologist records list a practice address in Palo Alto
They are 238 of the 7,617 NPPES records with a practice address in Palo Alto, and 12,647 clinical psychologist records in California.
All 12,647 in California → Every provider in Palo Alto → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Carolyn Anderson, PH.D.Palo Alto, CA 943061922201714
- Carla Chomka, PH.D.Palo Alto, CA 943061487862678
- Julie Graham, PSY.D.Palo Alto, CA 943061497972525
- Myrna Green, PH.D., CA LICENSED PPalo Alto, CA 943061467529776
- Christopher Harkness, PHDPalo Alto, CA 943061518089457
- Hilary Harrington, PH.D.Palo Alto, CA 943061497971170
- Lynne Henderson, PH.D.Palo Alto, CA 943061134340847
- Nevin Lantz, PH.D.Palo Alto, CA 943061922136878
Common questions
What is Nathaniel M. Pack, PSY.D.'s NPI number?
Nathaniel M. Pack, PSY.D.'s National Provider Identifier (NPI) is 1437483518, issued on Sep 23, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Nathaniel M. Pack, PSY.D. located?
The NPPES record lists a practice address at 117 S California Ave, Palo Alto, CA, 94306. Phone: (415) 847-6960. Providers update this record themselves, so call before visiting.
How can I verify Nathaniel M. Pack, PSY.D.'s license?
NPPES lists California license number PSY22991, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.