Dr. Andrew B. Napier, MD
- Medicare services, 2023
- 359
- Part D claims, 2024
- 114
- Publications
- 2
- Hospital affiliations
- 2
- Medical groups
- 6
- Practice address
- 1425 S Main Street, Walnut Creek, CA 94596
- Practice phone
- Call (925) 295-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Napier's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Andrew B. Napier is an emergency medicine physician in Walnut Creek, California
Dr. Napier practices at Walnut Creek Medical Center in Walnut Creek, California, part of Kaiser Permanente.
Dr. Napier's NPI, 1285175430, was assigned on March 20, 2017. Dr. Napier graduated from USF Health Morsani College of Medicine in 2017. Dr. Napier holds California license A169489.
- NPI
- 1285175430NPI Registry (opens in a new tab)
- NPI enumeration date
- March 20, 2017
- NPI status
- Active
- Practice phone
- (925) 295-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Andrew B. Napier practices at Walnut Creek Medical Center in Walnut Creek, California
Dr. Napier's primary practice is Walnut Creek Medical Center, at 1425 S Main Street, Walnut Creek, CA 94596 in Contra Costa County. The practice phone is (925) 295-4000.
- Walnut Creek Medical Center1425 S Main Street, Walnut Creek, CA 94596 · Contra Costa CountyPhone(925) 295-4000
Source: Dmand AI Affiliation Data
Dr. Andrew B. Napier is affiliated with 2 sites of care and 6 medical groups
Dr. Napier's primary practice is Walnut Creek Medical Center in Walnut Creek, California, part of Kaiser Permanente. Dr. Napier is also affiliated with Regional Medical Center. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Napier to 5 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Andrew B. Napier's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Napier practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Walnut Creek Medical Center | Available with a free account |
| +1 more site and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Andrew B. Napier is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Napier's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Napier is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Napier's licenses on file in 2 states: California and Florida.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
- Florida license
Emergency medicine physicians near Dr. Napier
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Andrew B. Napier billed Medicare for 359 services in 2023
CMS data shows 359 Medicare services from Dr. Napier across 4 procedure codes in 2023. Medicare paid $32,415 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Napier's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 6712023: 22666%
- Tests and treatments
- 2022: 4072023: 13367%
- Imaging
- 2022: 432023: 0100%
Dr. Napier compared with the California median for emergency medicine physicians, 2023
- Dr. Napier
- California median
- Medicare services
- 359vs 26535% above
- Part D claims
- 230vs 623.7 times
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Napier's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Napier?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Napier and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Andrew B. Napier's patients have a median age of 56
Across all payers, Dmand AI patient panel data puts Dr. Napier's median patient age at 56, with 57% women.
Dr. Napier's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women57%
- Men43%
Source: Dmand AI Patient Panel Data
Dr. Andrew B. Napier wrote 114 Medicare Part D claims in 2024
In 2024, Dr. Napier wrote 114 Medicare Part D claims for 77 patients. 89% of them were for generic drugs. They cover 11 drugs, with $3,652 in total drug cost. In 2022, CMS named 237 claims across 9 drugs.
Dr. Napier's Part D claims by kind of drug, 2024
- Generic102 claims89%
- Brand-name12 claims11%
Dr. Napier's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Napier's Part D claims, 2024
- Antibiotics32%36 of 114 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 2372023: 2303%
Drugs named by CMS: 11 in 2023, 9 in 2022.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Andrew B. Napier has 2 publications on record
Dmand AI links 2 papers to Dr. Napier in 2021. 2021 was the busiest year, with 2. Dr. Napier's most frequent co-author is Obteene Azimi-Ghomi, MD.
Dr. Napier's most frequent co-authors
Recent publications by Dr. Napier
See who Dr. Napier researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Napier works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Andrew B. Napier graduated from USF Health Morsani College of Medicine
Dr. Napier graduated from USF Health Morsani College of Medicine in 2017.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Andrew B. Napier accepts plans from 1 insurance carrier
Dr. Napier is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Andrew B. Napier'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)Medicare Part D Prescribers - by Provider (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 |
| 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. Andrew B. Napier
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. Andrew B. Napier's NPI number?
Dr. Andrew B. Napier's NPI number is 1285175430. It was assigned on March 20, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Andrew B. Napier?
Dr. Andrew B. Napier is an emergency medicine physician in Walnut Creek, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Andrew B. Napier practice?
Dr. Napier practices at 1425 S Main Street, Walnut Creek, CA 94596. Dr. Napier's primary practice is Walnut Creek Medical Center in Walnut Creek, California, part of Kaiser Permanente. Dmand AI also links Dr. Napier to 5 medical groups.
What is Dr. Andrew B. Napier's office phone number?
The practice phone on file for Dr. Napier is (925) 295-4000.
What is Dr. Andrew B. Napier's medical license number?
Dr. Napier holds California license A169489, one of the licenses on file in 2 states.
Which states has Dr. Andrew B. Napier been licensed in?
Dmand AI has state licenses on file for Dr. Napier in California (2020 to 2026) and Florida (2019 to 2021).
Which hospitals is Dr. Andrew B. Napier affiliated with?
Dr. Napier practices at Walnut Creek Medical Center in Walnut Creek, California. Dr. Napier is also affiliated with Regional Medical Center.
What medical group is Dr. Andrew B. Napier part of?
Dr. Napier is linked to The Permanente Medical Group, Inc. Dmand AI links Dr. Napier to 5 more medical groups.
Does Dr. Andrew B. Napier accept Medicare?
Yes. CMS data shows Dr. Napier billed Medicare for 359 services in 2023.
Is Dr. Andrew B. Napier board certified?
Yes. Dr. Napier is board certified in emergency medicine by the American Board of Emergency Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Andrew B. Napier bill to Medicare?
In 2023, Dr. Napier's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and critical care (99291).
Where did Dr. Andrew B. Napier go to medical school?
Dr. Napier graduated from USF Health Morsani College of Medicine in 2017.
What drugs does Dr. Andrew B. Napier prescribe most?
In 2023 Medicare Part D data, Dr. Napier's most prescribed drugs by claims were Ondansetron ODT, Prednisone and Ibuprofen.
How long has Dr. Andrew B. Napier been practicing?
Dr. Napier graduated from medical school in 2017, 9 years ago.
Does Dr. Andrew B. Napier do research?
Dmand AI links 2 publications to Dr. Napier.
Who does Dr. Andrew B. Napier publish with?
Dr. Napier's most frequent co-authors are Obteene Azimi-Ghomi, MD (1 shared paper).
What insurance does Dr. Andrew B. Napier accept?
Dr. Napier is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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