Mary Ann Nau Johnson, MD
Dermatology Physician · El Dorado Hills, CA
Mary Ann Nau Johnson, MD is a dermatology physician with a practice address in El Dorado Hills, California, and NPI 1508177163, issued on Jun 29, 2010. Check the license (California A113258, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary Ann Nau Johnson
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- A113258 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1264 Hawks Flight CT, El Dorado Hills, CA 95762
- Phone
- (916) 939-8400
- Enumerated
- Jun 29, 2010
- Record last updated
- Jul 14, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (916) 933-5013
- Medicare enrollment
- Enrolled (PECOS I20101008000770); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 1264 Hawks Flight CT
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christopher Olson, MDFamily Medicine Physician1912963331
- Wing-Yan Cindy Yuen, M.D.Family Medicine Physician1871804864
Verify Mary Ann Nau Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A113258Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% more Medicare Part D claims than the average dermatology physician in 2024
1,542 Medicare Part D claims for 520 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Ketoconazole200 claims
- Fluorouracil149 claims
- Clobetasol Propionate144 claims
- Triamcinolone Acetonide107 claims
- Hydrocortisone99 claims
- Mupirocin92 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).
Bills Medicare through one group practice
- Dignity Health Medical FoundationFolsom, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Ann Nau Johnson among 2,083 dermatology physician records in California
Mary Ann Nau Johnson, MD is one of 2,083 dermatology 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 2010, is newer than 64% of them.
- NPI issued2010 · 64% of these records are older, 33% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2009 · median 2006 among the 1,450 with a school on file
- Record last updated2015 · 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 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in El Dorado Hills → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Maulik Dhandha, MDRocklin, CA 957651972946366
- Chung-Yin Chan, M.D.Elk Grove, CA 957581033372768
- Elizabeth Kubiak, MDElk Grove, CA 957581407934169
- Neeta Malviya, MDElk Grove, CA 957581487189593
- Jamie McInturff, MDElk Grove, CA 957581194901728
- Amber Stevenson, M.D.Elk Grove, CA 957581831228980
- Aieska De Souza, MD, MSCElk Grove, CA 957571770733446
- Yong He, MDElk Grove, CA 957571215372032
Common questions
What is Mary Ann Nau Johnson, MD's NPI number?
Mary Ann Nau Johnson, MD's National Provider Identifier (NPI) is 1508177163, issued on Jun 29, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Mary Ann Nau Johnson, MD located?
The NPPES record lists a practice address at 1264 Hawks Flight CT, El Dorado Hills, CA, 95762. Phone: (916) 939-8400. Providers update this record themselves, so call before visiting.
How can I verify Mary Ann Nau Johnson, MD's license?
NPPES lists California license number A113258, 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 Mary Ann Nau Johnson, MD prescribe under Medicare Part D?
In 2024, Mary Ann Nau Johnson, MD had 1,542 Medicare Part D claims for 520 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is Mary Ann Nau Johnson, MD'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.