Margaret (meg) Seaver, MD
Hematology & Oncology Physician · Antioch, CA
Margaret (meg) Seaver, MD is a hematology & oncology physician with a practice address in Antioch, California, and NPI 1386753127, issued on Aug 29, 2006. Check the license (California A120074, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Margaret (meg) Seaver
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A120074 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4721 Dallas Ranch RD, Antioch, CA 94531
- Phone
- (925) 778-0679
- Enumerated
- Aug 29, 2006
- Record last updated
- Oct 16, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (925) 778-3567
- Medicare enrollment
- Enrolled (PECOS I20130312000469); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 2005
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 4721 Dallas Ranch RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Zahora Ally, MDRadiation Oncology Physician1306839915
- Joseph Beck, M.D.Radiation Oncology Physician1740206085
- Susan Bucker, LCSWClinical Social Worker1588935050
- Jiyon Choi, MDHematology & Oncology Physician1144437567
- Mariam Korah, MDRadiation Oncology Physician1083891543
- Tuan Pham, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1588369342
Verify Margaret (meg) Seaver in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A120074Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,499 Medicare Part D claims for 192 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 238 claims were for opioids.
Most prescribed
- Letrozole118 claims
- Hydrocodone-Acetaminophen89 claims
- Prochlorperazine Maleate50 claims
- Ondansetron Hcl45 claims
- Eliquis44 claims
- Lorazepam42 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: $251.66
12 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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
- Epic CareAntioch, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret (meg) Seaver among 1,583 hematology & oncology physician records in California
Margaret (meg) Seaver, MD is one of 1,583 hematology & oncology physician records with a practice address in California. 83% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2005 · median 2003 among the 1,124 with a school on file
- Record last updated2017 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Antioch → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Jiyon Choi, MDAntioch, CA 945311144437567
- John Ganey, MDAntioch, CA 945311215935713
- Bimal Patel, M.D.Antioch, CA 945311841298221
- Prasad Pillai, MDAntioch, CA 945311023174380
- Srikanth Reddy, M.D.Antioch, CA 945311649440744
- Sukhwant Singh, MDAntioch, CA 945311285839209
- Wilson Tong, M.D.Antioch, CA 945311427261437
- Jonathan Lopez, MDFairfield, CA 945331881682714
Common questions
What is Margaret (meg) Seaver, MD's NPI number?
Margaret (meg) Seaver, MD's National Provider Identifier (NPI) is 1386753127, issued on Aug 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Margaret (meg) Seaver, MD located?
The NPPES record lists a practice address at 4721 Dallas Ranch RD, Antioch, CA, 94531. Phone: (925) 778-0679. Providers update this record themselves, so call before visiting.
How can I verify Margaret (meg) Seaver, MD's license?
NPPES lists California license number A120074, 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 Margaret (meg) Seaver, MD prescribe under Medicare Part D?
In 2024, Margaret (meg) Seaver, MD had 1,499 Medicare Part D claims for 192 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.