Alexander N. Greiner, M.D.
Allergy & Immunology Physician · San Diego, CA
Alexander N. Greiner, M.D. is an allergy & immunology physician with a practice address in San Diego, California, and NPI 1609801299, issued on Jul 11, 2006. Check the license (California A77327, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alexander N. Greiner
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- A77327 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5776 Ruffin RD, San Diego, CA 92123
- Phone
- (858) 292-1144
- Enumerated
- Jul 11, 2006
- Record last updated
- Mar 14, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (858) 268-5145
- Medicare enrollment
- Enrolled (PECOS I20120515000549); accepts Medicare assignment
- Medical or professional school
- State University Of Ny Upstate Medical University, 1998
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 5776 Ruffin RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Martin Caha, MDAllergy & Immunology Physician1720548209
- Ethan Canty, MDAllergy & Immunology Physician1790312536
- Bob Geng, M.D.Allergy & Immunology Physician1356570758
- Barbara Goergen, N.P.Nurse Practitioner1720150857
- Jill Greer, MS, RD, CNSCPediatric Nutrition Registered Dietitian1891047940
- Mikaelah Kuenhold, FNP-CFamily Nurse Practitioner1164141164
Verify Alexander N. Greiner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A77327Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
360 Medicare Part D claims for 57 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.
Most prescribed
- Dupixent Pen24 claims
- Albuterol Sulfate Hfa23 claims
- Fluticasone Propionate23 claims
- Trelegy Ellipta23 claims
- Ipratropium Bromide19 claims
- Montelukast Sodium18 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: $41,359.46
35 payments; by number, the most common kind was food and beverage; the largest payer was Cipla USA Inc. The 2,496 providers of this specialty with any payment received $8,321.81 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
- Rady Children's Hospital San DiegoEscondido, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Allergy & Immunology Physician providers in California
There are 444 allergy & immunology physician records in California.
Other allergy & immunology physician records in California
- Edsel Abud, MD, PHDLa Jolla, CA1891257192
- Seema Aceves, M.D., PH.D.San Diego, CA1366511628
- Terrie Ahn, MDSanta Monica, CA1093166795
- Rhonda Alkatib, M.D.San Diego, CA1417363086
- Mercedes Amado, M.D.San Diego, CA1477510287
- Loula Amin, M.D.Newport Beach, CA1043452782
- A Aminian, M.D.Fresno, CA1508080193
- Ali Amirzadeh, M.D.Sacramento, CA1083748685
- Lorraine Anderson, MDSanta Monica, CA1013209568
- Joshua Ang, DOPasadena, CA1699398016
Common questions
What is Alexander N. Greiner, M.D.'s NPI number?
Alexander N. Greiner, M.D.'s National Provider Identifier (NPI) is 1609801299, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alexander N. Greiner, M.D. located?
The NPPES record lists a practice address at 5776 Ruffin RD, San Diego, CA, 92123. Phone: (858) 292-1144. Providers update this record themselves, so call before visiting.
How can I verify Alexander N. Greiner, M.D.'s license?
NPPES lists California license number A77327, 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 Alexander N. Greiner, M.D. prescribe under Medicare Part D?
In 2024, Alexander N. Greiner, M.D. had 360 Medicare Part D claims for 57 beneficiaries; the average among allergy & immunology physician prescribers was 741. 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.