Kiefer Greenspan
Psychiatry Physician · Irvine, CA
Kiefer Greenspan is a psychiatry physician with a practice address in Irvine, California, and NPI 1629573464, issued on Mar 26, 2018. Check the license (California A176625, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kiefer Greenspan
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A176625 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2646 Dupont Drive Suite 60, Irvine, CA 92612
- Phone
- (949) 230-3543
- Enumerated
- Mar 26, 2018
- Record last updated
- Jun 16, 2025
- Medicare enrollment
- Enrolled (PECOS I20220802002742); accepts Medicare assignment
- Medical or professional school
- University Of Pittsburgh School Of Medicine, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Verify Kiefer Greenspan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A176625Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% more Medicare Part D claims than the average psychiatry physician in 2024
1,456 Medicare Part D claims for 108 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Trazodone Hcl97 claims
- Bupropion Xl96 claims
- Escitalopram Oxalate89 claims
- Sertraline Hcl82 claims
- Quetiapine Fumarate69 claims
- Gabapentin61 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $4,708.43
204 payments; by number, the most common kind was food and beverage; the largest payer was Axsome Therapeutics, Inc. The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Harbor Psychiatry And Mental Health Professional CorporationNewport Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kiefer Greenspan among 8,673 psychiatry physician records in California
Kiefer Greenspan is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 82% of them.
- NPI issued2018 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2018 · median 2005 among the 3,295 with a school on file
- Record last updated2025 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
54 psychiatry physician records list a practice address in Irvine
They are 54 of the 7,778 NPPES records with a practice address in Irvine, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Irvine → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Bahman Amadi, M.D.Irvine, CA 926121346660925
- Arde Anoshivani, M.D.Irvine, CA 926121396845186
- Gezelle Azar, M.D.Irvine, CA 926121861954687
- Yujuan Choy, MDIrvine, CA 926121750467148
- Roula Creighton, M.D.Irvine, CA 926121821142373
- Shilpa Diwan, M.D, M.P.HIrvine, CA 926121942457999
- Laurence Greenberg, MDIrvine, CA 926121831390103
- Parisa Hashemi, DOIrvine, CA 926121013410588
Common questions
What is Kiefer Greenspan's NPI number?
Kiefer Greenspan's National Provider Identifier (NPI) is 1629573464, issued on Mar 26, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Kiefer Greenspan located?
The NPPES record lists a practice address at 2646 Dupont Drive Suite 60, Irvine, CA, 92612. Phone: (949) 230-3543. Providers update this record themselves, so call before visiting.
How can I verify Kiefer Greenspan's license?
NPPES lists California license number A176625, 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.
How much does Kiefer Greenspan prescribe under Medicare Part D?
In 2024, Kiefer Greenspan had 1,456 Medicare Part D claims for 108 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions 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.