Mark Alexander Forsberg, MD
Hematology & Oncology Physician · Los Angeles, CA
Mark Alexander Forsberg, MD is a hematology & oncology physician with a practice address in Los Angeles, California, and NPI 1639638661, issued on Mar 19, 2019. Check the license (California A209783, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Alexander Forsberg
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A209783 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1441 Eastlake Ave, Los Angeles, CA 90089
- Phone
- (800) 872-2273
- Enumerated
- Mar 19, 2019
- Record last updated
- Aug 3, 2026
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 1441 Eastlake Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Agulnik, MDMedical Oncology Physician1164448734
- Sandra AlgazeMedical Oncology Physician1861886707
- Paige Asawa, LMFTMarriage & Family Therapist1487296406
- Akbar Ashrafi, MDStudent in an Organized Health Care Education/Training Program1063913531
- Cherry AuHematology & Oncology Physician1346828076
- Raed Azhar, M.DUrology Physician1093061053
Verify Mark Alexander Forsberg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A209783Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
415 Medicare Part D claims for 89 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Abiraterone Acetate23 claims
- Prednisone22 claims
- Valacyclovir18 claims
- Gabapentin15 claims
- Allopurinol13 claims
- Ondansetron Hcl13 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.
Mark Alexander Forsberg among 1,583 hematology & oncology physician records in California
Mark Alexander Forsberg, 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 2019, is newer than 95% of them.
- NPI issued2019 · 95% of these records are older, 3% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 71% of these records are
- Record last updated2026 · 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 Los Angeles → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Preet Chaudhary, M.D., PHDLos Angeles, CA 900891487626354
- Gino In, MDLos Angeles, CA 900891912227273
- Kevin Kelly, M.D.Los Angeles, CA 900891093963712
- Howard Liebman, M.D.Los Angeles, CA 900891134159775
- Ann Mohrbacher, M.D.Los Angeles, CA 900891275578957
- Jorge Nieva, M.D.Los Angeles, CA 900891497717672
- Casey O'Connell, M.D.Los Angeles, CA 900891104039197
- Raghuveer Ranganathan, M.D.Los Angeles, CA 900891831354356
Common questions
What is Mark Alexander Forsberg, MD's NPI number?
Mark Alexander Forsberg, MD's National Provider Identifier (NPI) is 1639638661, issued on Mar 19, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Mark Alexander Forsberg, MD located?
The NPPES record lists a practice address at 1441 Eastlake Ave, Los Angeles, CA, 90089. Phone: (800) 872-2273. Providers update this record themselves, so call before visiting.
How can I verify Mark Alexander Forsberg, MD's license?
NPPES lists California license number A209783, 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 Mark Alexander Forsberg, MD prescribe under Medicare Part D?
In 2024, Mark Alexander Forsberg, MD had 415 Medicare Part D claims for 89 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.