Grant Seiden, MD
Surgery of the Hand (Surgery) Physician · Oceanside, CA
Grant Seiden, MD is a surgery of the hand (surgery) physician with a practice address in Oceanside, California, and NPI 1992025407, issued on Jun 7, 2010. Check the license (California A142455, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Grant Seiden
- Credential
- MD
- Primary taxonomy
- Surgery of the Hand (Surgery) Physician 2086S0105X
- License number
- A142455 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3905 Waring RD, Oceanside, CA 92056
- Phone
- (760) 724-9000
- Enumerated
- Jun 7, 2010
- Record last updated
- Nov 20, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (760) 724-3686
- Medicare enrollment
- Enrolled (PECOS I20160711000902); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest surgery of the hand (surgery) physician records → All 39 in California → Look up another NPI →
Also registered at 3905 Waring RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bayan Aghdasi, M.D.Orthopaedic Surgery of the Spine Physician1225476500
- Neville Alleyne, M.D.Orthopaedic Surgery of the Spine Physician1346200425
- David Amory, M.D.Orthopaedic Surgery Physician1659358786
- Rachel Anderson, RN, MSN, FNPFamily Nurse Practitioner1235435587
- Leslie Bishop, NPNurse Practitioner1669941878
- Brian Bobick, D.P.M.Foot & Ankle Surgery Podiatrist1639156771
Verify Grant Seiden in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A142455Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% more Medicare Part D claims than the average surgery of the hand (surgery) physician in 2024
240 Medicare Part D claims for 192 beneficiaries, against an average of 188 among the 346 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 211 claims were for opioids.
Most prescribed
- Tramadol Hcl117 claims
- Hydrocodone-Acetaminophen86 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): 52.1 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: $1,691.14
16 payments; by number, the most common kind was food and beverage; the largest payer was Trimed, Inc. The 296 providers of this specialty with any payment received $4,725.83 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
- Tri-City Orthopaedic Surgery Medical Group Inc.Oceanside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Grant Seiden among 39 surgery of the hand (surgery) physician records in California
Grant Seiden, MD is one of 39 surgery of the hand (surgery) physician records with a practice address in California. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 74% of them.
- NPI issued2010 · 74% of these records are older, 15% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2010 · median 2000 among the 29 with a school on file
- Record last updated2019 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086S0105X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery of the Hand (Surgery) Physician providers in California
There are 39 surgery of the hand (surgery) physician records in California.
All 39 in California → Every provider in Oceanside → Surgery of the Hand (Surgery) Physician nationwide →
The 8 surgery of the hand (surgery) physician records with the nearest ZIP codes
- Anisa Yalom, MDSan Marcos, CA 920691164679908
- Mark Slonim, M.D.La Jolla, CA 920371730410747
- Julie Gilbert, M.D.San Diego, CA 921231659378990
- Gregory Mack, M.D.San Diego, CA 921231528169513
- David Subin, M.D.San Diego, CA 921231770694622
- Walter Chang, MDFontana, CA 923351083781835
- Sharon Kalina, MDFontana, CA 923351053488908
- Ravi Kiran, MDFontana, CA 923351952459984
Common questions
What is Grant Seiden, MD's NPI number?
Grant Seiden, MD's National Provider Identifier (NPI) is 1992025407, issued on Jun 7, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Grant Seiden, MD located?
The NPPES record lists a practice address at 3905 Waring RD, Oceanside, CA, 92056. Phone: (760) 724-9000. Providers update this record themselves, so call before visiting.
How can I verify Grant Seiden, MD's license?
NPPES lists California license number A142455, 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 Grant Seiden, MD prescribe under Medicare Part D?
In 2024, Grant Seiden, MD had 240 Medicare Part D claims for 192 beneficiaries; the average among surgery of the hand (surgery) physician prescribers was 188. Part D covers Medicare prescriptions only.
What is Grant Seiden, MD's MIPS final score?
The 2023 MIPS final score is 52.1 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.