Rajan K. Merchant, M.D.
Allergy & Immunology Physician · Woodland, CA
Rajan K. Merchant, M.D. is an allergy & immunology physician with a practice address in Woodland, California, and NPI 1396773552, issued on Jun 28, 2006. Check the license (California A93989, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rajan K. Merchant
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- A93989 CA
Self-reported in NPPES; status is on the state search - Practice location
- 632 W Gibson RD, Woodland, CA 95695
- Phone
- (530) 666-1631
- Enumerated
- Jun 28, 2006
- Record last updated
- Mar 4, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20061108000418); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 444 in California → Look up another NPI →
Also registered at 632 W Gibson RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amr Abdelaty, MDHospitalist Physician1962996348
- Alan Aceves, PACMedical Physician Assistant1912930983
- Clariza Aguillon-Doms, NPNurse Practitioner1174836993
- Sammy Almashat, M.D.Occupational Medicine Physician1194987578
- Khuram Arif, MDPediatrics Physician1851492268
- Irma Bernal, NPFamily Nurse Practitioner1902553878
Verify Rajan K. Merchant in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A93989Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% more Medicare Part D claims than the average allergy & immunology physician in 2024
1,083 Medicare Part D claims for 138 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 34% of claims.
Most prescribed
- Montelukast Sodium292 claims
- Levocetirizine Dihydrochloride130 claims
- Dulera74 claims
- Ipratropium Bromide60 claims
- Fluticasone Propionate59 claims
- Symbicort58 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 MIPS final score for 2023 (Medicare payment program): 96.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,414.81
4 payments; by number, the most common kind was food and beverage; the largest payer was Incyte Corporation. 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
- Dignity Health Medical FoundationDavis, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rajan K. Merchant among 444 allergy & immunology physician records in California
Rajan K. Merchant, M.D. is one of 444 allergy & immunology physician records with a practice address in California. 79% 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, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2000 · median 2004 among the 281 with a school on file
- Record last updated2010 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in California
There are 444 allergy & immunology physician records in California.
All 444 in California → Every provider in Woodland → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Angelina Crans Yoon, MDWoodland, CA 956951336419290
- Nicole Canon, MDVacaville, CA 956881104288398
- Guillermo Mendoza, MDVacaville, CA 956881306998521
- Kamineni Rao, MDRancho Cordova, CA 956701508905688
- Arif Seyal, MDRancho Cordova, CA 956701215951199
- Matthew Bowdish, M.D.Roseville, CA 956611770767923
- Terrance ChangRoseville, CA 956611861561219
- Asha Desai, M.D.Roseville, CA 956611750466298
Common questions
What is Rajan K. Merchant, M.D.'s NPI number?
Rajan K. Merchant, M.D.'s National Provider Identifier (NPI) is 1396773552, issued on Jun 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Rajan K. Merchant, M.D. located?
The NPPES record lists a practice address at 632 W Gibson RD, Woodland, CA, 95695. Phone: (530) 666-1631. Providers update this record themselves, so call before visiting.
How can I verify Rajan K. Merchant, M.D.'s license?
NPPES lists California license number A93989, 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 Rajan K. Merchant, M.D. prescribe under Medicare Part D?
In 2024, Rajan K. Merchant, M.D. had 1,083 Medicare Part D claims for 138 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
What is Rajan K. Merchant, M.D.'s MIPS final score?
The 2023 MIPS final score is 96.5 of 100. 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.