Gregory Bion Bierer, MD
Pulmonary Disease Physician · Santa Monica, CA
Gregory Bion Bierer, MD is a pulmonary disease physician with a practice address in Santa Monica, California, and NPI 1154489433, issued on Dec 5, 2006. Check the license (California A77403, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Bion Bierer
- Credential
- MD
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- A77403 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1223 16TH St, Santa Monica, CA 90404
- Phone
- (310) 449-0939
- Enumerated
- Dec 5, 2006
- Record last updated
- Jan 7, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (424) 259-7790
- Medicaid ID
- 1154489433 CA
- Medicare enrollment
- Enrolled (PECOS I20070326000114); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 1,443 in California → Look up another NPI →
Also registered at 1223 16TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Alishia KingPharmacist1295400703
- Irawan Susanto, MDCritical Care Medicine (Internal Medicine) Physician1003836610
Verify Gregory Bion Bierer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A77403Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% more Medicare Part D claims than the average pulmonary disease physician in 2024
1,644 Medicare Part D claims for 246 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 52% of claims.
Most prescribed
- Albuterol Sulfate Hfa242 claims
- Trelegy Ellipta119 claims
- Ipratropium Bromide85 claims
- Breo Ellipta81 claims
- Anoro Ellipta80 claims
- Zolpidem Tartrate66 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 86.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $104.29
4 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,806 providers of this specialty with any payment received $5,159.88 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
- The Regents OF The University OF CaliforniaLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Bion Bierer among 1,443 pulmonary disease physician records in California
Gregory Bion Bierer, MD is one of 1,443 pulmonary disease physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 51% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2000 · median 2002 among the 1,061 with a school on file
- Record last updated2020 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in California
There are 1,443 pulmonary disease physician records in California.
All 1,443 in California → Every provider in Santa Monica → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Ravi Aysola, M.D.Santa Monica, CA 904041710008834
- Hossein Babaali, M.D.Santa Monica, CA 904041699790584
- Joanne Bando, MDSanta Monica, CA 904041609083773
- James Burrows, M.D.Santa Monica, CA 904041790872281
- Colleen Channick, M.D.Santa Monica, CA 904041023043775
- Burt Charuworn, MDSanta Monica, CA 904041508899808
- Gerard Frank, MDSanta Monica, CA 904041982639571
- Paul Haberman, M.D.Santa Monica, CA 904041861589392
Common questions
What is Gregory Bion Bierer, MD's NPI number?
Gregory Bion Bierer, MD's National Provider Identifier (NPI) is 1154489433, issued on Dec 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Bion Bierer, MD located?
The NPPES record lists a practice address at 1223 16TH St, Santa Monica, CA, 90404. Phone: (310) 449-0939. Providers update this record themselves, so call before visiting.
How can I verify Gregory Bion Bierer, MD's license?
NPPES lists California license number A77403, 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 Gregory Bion Bierer, MD prescribe under Medicare Part D?
In 2024, Gregory Bion Bierer, MD had 1,644 Medicare Part D claims for 246 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
What is Gregory Bion Bierer, MD's MIPS final score?
The 2023 MIPS final score is 86.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.