MARY ANN NAU JOHNSON MD
NPI 1508177163
Dermatology in El Dorado Hills, CA
About Mary Ann Nau Johnson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY ANN NAU JOHNSON MD (NPI 1508177163) is an individual dermatology provider in El Dorado Hills, California, licensed in California (A113258) and active in the NPI registry since June 2010. She is enrolled in Medicare PECOS and is a graduate of Other (2009).
NPPES Registry Identity
Specialties & Licenses 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mary Ann Nau Johnson Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Mary Ann Johnson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
El Dorado Hills, CA 95762
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Dignity Health Medical Foundation
- 1,191 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 20
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 95762 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
EL DORADO HILLS, CA 95762
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Mary Ann Johnson's NPI number?
The NPI number for Mary Ann Johnson is 1508177163. It was assigned to this individual provider in the NPPES registry on June 29, 2010.
Where is Mary Ann Johnson located?
Mary Ann Johnson practices at 1264 Hawks Flight Ct Suite 100, El Dorado Hills, CA 95762. The listed phone number is (916) 939-8400.
What is Mary Ann Johnson's specialty?
The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.
Is Mary Ann Johnson enrolled in Medicare?
Yes. Mary Ann Johnson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Mary Ann Johnson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Ann Johnson reassigns Medicare benefits to Chw Medical Foundation (El Dorado Hills, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mary Ann Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Mary Ann Johnson was last updated on July 14, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mary Ann Nau Johnson, MD · NPI 1508177163
Dermatology physician in El Dorado Hills, California. Individual provider, active in the CMS NPPES registry since June 29, 2010.
## Identity
- **NPI:** 1508177163 (Entity type: Individual)
- **Enumerated:** June 29, 2010
- **Primary specialty:** Dermatology · taxonomy 207N00000X
- **State license:** A113258 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1264 HAWKS FLIGHT CT, SUITE 100, El Dorado Hills, CA 95762-9348
- **Phone:** (916) 939-8400 · **Fax:** (916) 933-5013
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Chw Medical Foundation (NPI 1942430566, El Dorado Hills, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2009
## Record status
- **NPPES last updated:** July 14, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1508177163) · Data from the CMS NPPES public registry.