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Dr. Stanley Masaji Naguwa, MD
NPI1447231873
- Medicare services, 2021
- 296
- Part D claims, 2021
- 479
- Publications
- 33
- Hospital affiliations
- 1
- Industry payments
- $28,067
- Practice address
- 2315 Stockton Boulevard, Sacramento, CA 95817
- Practice phone
- Call (916) 734-2011
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Stanley Masaji Naguwa is a rheumatologist in Sacramento, California
Dr. Naguwa practices at UC Davis Medical Center in Sacramento, California, part of University of California Health.
Dr. Naguwa's NPI, 1447231873, was assigned on November 11, 2005. Dr. Naguwa graduated from University Of Washington School Of Medicine in 1973. Dr. Naguwa's California license number on file is G33104.
NPI and contact details
- NPI
- 1447231873NPI Registry (opens in a new tab)
- NPI enumeration date
- November 11, 2005
- NPI status
- Active
- Practice phone
- (916) 734-2011
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1973
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Stanley Masaji Naguwa practices at UC Davis Medical Center in Sacramento, California
Dr. Naguwa's primary practice is UC Davis Medical Center, at 2315 Stockton Boulevard, Sacramento, CA 95817 in Sacramento County. The practice phone is (916) 734-2011.
- UC Davis Medical Center2315 Stockton Boulevard, Sacramento, CA 95817 · Sacramento CountyPhone(916) 734-2011
Source: Dmand AI Affiliation Data
Dr. Stanley Masaji Naguwa is affiliated with 3 sites of care and 2 medical groups
Dr. Naguwa's primary practice is UC Davis Medical Center in Sacramento, California, part of University of California Health. The medical group on file is UC Davis Medical Group. Dmand AI also links Dr. Naguwa to 2 more group practices and clinics and 1 medical group, each named with a free account.
UC Davis Medical Group2 group practices and clinicsNames with a free account1 medical groupName with a free account
See all 5 affiliations for Dr. NaguwaSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stanley Masaji Naguwa's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Naguwa practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UC Davis Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stanley Masaji Naguwa is one of 821 rheumatologists in California
Rheumatology is Dr. Naguwa's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Naguwa is board certified in allergy & immunology by the American Board of Allergy and Immunology. Dr. Naguwa has a license on file in California.
Specialties and state licenses
- Rheumatology, CaliforniaPrimary
Rheumatologists near Dr. Naguwa
Counts of rheumatologists with a Dmand AI profile, by place and practice. Each opens the list.
821rheumatologists in California28rheumatologists in Sacramento16rheumatologists at UC Davis Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Stanley Masaji Naguwa billed Medicare for 296 services in 2021
CMS data shows 296 Medicare services from Dr. Naguwa across 6 procedure codes in 2021. Medicare paid $14,101 for them. Every service was in an office.
Medicare services, 2021296
Paid by Medicare$14,101
Procedure codes6
Dr. Naguwa's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 3182021: 17346%
- Tests and treatments
- 2020: 5072021: 12376%
- Drugs given in the office
- 2020: 7202021: 0100%
- Other services
- 2020: 202021: 0100%
Dr. Naguwa compared with the California median for rheumatologists, 2021
- Dr. Naguwa
- California median
- Medicare services
- 296vs 90067% below
- Part D claims
- 479vs 96250% below
Medians across 773 rheumatologists in California with Dmand AI profiles that report each measure.
Dr. Naguwa's most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stanley Masaji Naguwa's patients have a median age of 58
Across all payers, Dmand AI patient panel data puts Dr. Naguwa's median patient age at 58, with 62% women.
Dr. Naguwa's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women62%
- Men36%
Source: Dmand AI Patient Panel Data
Dr. Stanley Masaji Naguwa wrote 479 Medicare Part D claims in 2021
In 2021, Dr. Naguwa wrote 479 Medicare Part D claims. They cover 19 drugs, with $649,005 in total drug cost. In 2020, CMS named 851 claims across 28 drugs.
Part D claims, 2021479
Drugs named by CMS19
Total drug cost$649,005
Dr. Naguwa's most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 8512021: 47944%
Drugs named by CMS: 19 in 2021, 28 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Stanley Masaji Naguwa has 33 publications on record
Dmand AI links 33 papers to Dr. Naguwa, published from 2006 to 2014. 2009 was the busiest year, with 5. The most frequent topics are Autoimmune Diseases, Arthritis, Rheumatoid and Diagnosis, Differential. Dr. Naguwa has published most often in Autoimmun Rev. Dr. Naguwa's most frequent co-authors are Gurtej S. Cheema, MD, Anupama Savithri Bhat, MD and Jennifer L. Lee, MD.
Papers33
Years published2006 to 2014
Dr. Naguwa's papers by year, 2006 to 2014
Topics Dr. Naguwa writes about most
- Autoimmune Diseases
- Arthritis, Rheumatoid
- Diagnosis, Differential
- Tumor Necrosis Factor-alpha
- Anti-Inflammatory Agents, Non-Steroidal
- Antirheumatic Agents
- Lupus Erythematosus, Systemic
- Magnetic Resonance Imaging
Dr. Naguwa's most frequent co-authors
- Gurtej S. Cheema, MD12 shared papers
- Anupama Savithri Bhat, MD3 shared papers
- Jennifer L. Lee, MD3 shared papers
Recent publications by Dr. Naguwa
Disease ProgressionLupus Nephritis
Antirheumatic AgentsAutoantibodiesAutoimmune Diseases
Administration, OralAdrenal Cortex HormonesBone and Bones
Eur J Nucl Med Mol Imaging
Arthritis, RheumatoidFluorodeoxyglucose F18Magnetic Resonance Imaging
See who Dr. Naguwa researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Naguwa works with, so you can find a warm path to the right rheumatologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Stanley Masaji Naguwa received $28,067 in industry payments from 2016 to 2021
CMS Open Payments shows 214 general payments to Dr. Naguwa from 20 drug and device companies from 2016 to 2021. Honoraria make up the largest share, 69% of the total. Horizon Pharma plc paid the most, $20,576.
General payments to Dr. Naguwa by program year, 2016 to 2021
General payments to Dr. Naguwa by kind, 2016 to 2021
$28.1Kin total
- Honoraria$19,24469%
- Food and beverage$7,16526%
- Travel and lodging$9383%
- Education$5202%
- Consulting fees$2001%
Companies that paid Dr. Naguwa the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stanley Masaji Naguwa has 3 awards and honors on record
Dmand AI lists 3 awards for Dr. Naguwa, most recently CMS Stage 1 EHR in 2012.
Awards and honors for Dr. Naguwa
- 2012
- CMS Stage 1 EHR
- Undated
- AAAAI Fellow
- ACR Fellow
Source: Dmand AI Professional Profile Data
Dr. Stanley Masaji Naguwa graduated from University Of Washington School Of Medicine
Dr. Naguwa graduated from University Of Washington School Of Medicine in 1973. Dr. Naguwa is a member of AAAAI and ACR.
- Medical school
- Board certified in allergy & immunology
- Board certified in internal medicine
- Board certified in rheumatology
Source: Dmand AI Professional Profile Data
Dr. Stanley Masaji Naguwa accepts plans from 8 insurance carriers
Dr. Naguwa is in network with 8 carriers, including Excellus BlueCross BlueShield, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Excellus BlueCross BlueShield
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Blue Cross and Blue Shield of Kansas City
- Elevance
Plan types Dr. Naguwa accepts, by number of carriers
- PPO7
- Medicare6
- HMO3
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Stanley Masaji Naguwa's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Stanley Masaji Naguwa
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Stanley Masaji Naguwa's NPI number?
Dr. Stanley Masaji Naguwa's NPI number is 1447231873. It was assigned on November 11, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Stanley Masaji Naguwa?
Dr. Stanley Masaji Naguwa is a rheumatologist in Sacramento, California. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Stanley Masaji Naguwa practice?
Dr. Naguwa practices at 2315 Stockton Boulevard, Sacramento, CA 95817. Dr. Naguwa's primary practice is UC Davis Medical Center in Sacramento, California, part of University of California Health. Dmand AI also links Dr. Naguwa to 2 group practices and clinics and 1 medical group.
What is Dr. Stanley Masaji Naguwa's office phone number?
The practice phone on file for Dr. Naguwa is (916) 734-2011.
What is Dr. Stanley Masaji Naguwa's medical license number?
Dr. Naguwa's California license number on file is G33104.
Which hospitals is Dr. Stanley Masaji Naguwa affiliated with?
Dr. Naguwa practices at UC Davis Medical Center in Sacramento, California.
What medical group is Dr. Stanley Masaji Naguwa part of?
Dr. Naguwa is linked to UC Davis Medical Group. Dmand AI links Dr. Naguwa to 1 more medical group.
Does Dr. Stanley Masaji Naguwa accept Medicare?
Yes. CMS data shows Dr. Naguwa billed Medicare for 296 services in 2021.
Is Dr. Stanley Masaji Naguwa board certified?
Yes. Dr. Naguwa is board certified in allergy & immunology by the American Board of Allergy and Immunology.
What services does Dr. Stanley Masaji Naguwa bill to Medicare?
In 2021, Dr. Naguwa's most billed Medicare services were allergy test or treatment (95115), office visit, established patient (99213) and office visit, established patient (99214).
Show 7 more questionsShow fewer questions
Where did Dr. Stanley Masaji Naguwa go to medical school?
Dr. Naguwa graduated from University Of Washington School Of Medicine in 1973.
What drugs does Dr. Stanley Masaji Naguwa prescribe most?
In 2021 Medicare Part D data, Dr. Naguwa's most prescribed drugs by claims were Hydroxychloroquine Sulfate, Prednisone and Methotrexate.
Has Dr. Stanley Masaji Naguwa received payments from drug or device companies?
CMS Open Payments shows $28,067 in general payments to Dr. Naguwa from 20 companies from 2016 to 2021. The largest total came from Horizon Pharma plc.
How long has Dr. Stanley Masaji Naguwa been practicing?
Dr. Naguwa graduated from medical school in 1973, 53 years ago.
Does Dr. Stanley Masaji Naguwa do research?
Dmand AI links 33 publications to Dr. Naguwa, published from 2006 to 2014.
Who does Dr. Stanley Masaji Naguwa publish with?
Dr. Naguwa's most frequent co-authors are Gurtej S. Cheema, MD (12 shared papers), Anupama Savithri Bhat, MD (3 shared papers) and Jennifer L. Lee, MD (3 shared papers).
What insurance does Dr. Stanley Masaji Naguwa accept?
Dr. Naguwa is in network with 8 carriers, including Excellus BlueCross BlueShield, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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