Marcie Ryan, PA-C
- Part D claims, 2024
- 2,456
- Hospital affiliations
- 2
- Industry payments
- $485
- Medical groups
- 2
- State license
- 1
- Practice address
- 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598
- Practice phone
- Call (925) 939-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Marcie Ryan'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.
Marcie Ryan is a physician assistant in Walnut Creek, California
Marcie Ryan practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health.
Marcie Ryan's NPI, 1821102393, was assigned on August 19, 2006. Marcie Ryan holds California license 21387.
- NPI
- 1821102393NPI Registry (opens in a new tab)
- NPI enumeration date
- August 19, 2006
- NPI status
- Active
- Practice phone
- (925) 939-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Marcie Ryan practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California
Marcie Ryan's primary practice is John Muir Medical Center, Walnut Creek, at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 in Contra Costa County. The practice phone is (925) 939-3000.
- John Muir Medical Center, Walnut Creek1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 · Contra Costa CountyPhone(925) 939-3000
Source: Dmand AI Affiliation Data
Marcie Ryan is affiliated with 4 sites of care and 2 medical groups
Marcie Ryan's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. The medical group on file is Stanford Medicine Partners. Dmand AI also links Marcie Ryan to 1 more hospital, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Marcie Ryan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Marcie Ryan practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| John Muir Medical Center, Walnut Creek | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across John Muir Health and 6.2K+ hospitals, with verified contacts in the same login.
Marcie Ryan is one of 11,482 physician assistants in California
Physician assistant is Marcie Ryan's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Marcie Ryan is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). Marcie Ryan is licensed in California.
Specialties and state licenses
- Physician assistant, CaliforniaPrimary
Physician assistants near Marcie Ryan
Counts of physician assistants 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
Marcie Ryan's patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Marcie Ryan's median patient age at 63, with 53% women.
Marcie Ryan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women53%
- Men43%
Source: Dmand AI Patient Panel Data
Marcie Ryan wrote 2,456 Medicare Part D claims in 2024
In 2024, Marcie Ryan wrote 2,456 Medicare Part D claims for 1,016 patients. 89% of them were for generic drugs. CMS names the drug for 1,738 of them, across 55 drugs with 11 or more claims each, at $60,381 in total drug cost.
Marcie Ryan's Part D claims by kind of drug, 2024
- Generic2,192 claims89%
- Brand-name and other264 claims11%
Marcie Ryan's most prescribed drugs by claims, 2024
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 Marcie Ryan's Part D claims, 2024
- Opioids1%14 of 2,456 claims
- Antibiotics6%152 of 2,456 claims
- Antipsychotics, patients 65 and over1%15 of 2,456 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
For MedTech and pharma teams
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Marcie Ryan received $485 in industry payments from 2024 to 2025
CMS Open Payments shows 22 general payments to Marcie Ryan from 13 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $113.
General payments to Marcie Ryan by program year, 2024 to 2025
Companies that paid Marcie Ryan the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Marcie Ryan is board certified in certified physician assistant
Marcie Ryan is a member of AAPA.
- Board certified in certified physician assistant
Source: Dmand AI Professional Profile Data
Sources for Marcie Ryan'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 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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 Marcie Ryan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Marcie Ryan's NPI number?
Marcie Ryan's NPI number is 1821102393. It was assigned on August 19, 2006, and it is active in the NPI Registry.
What does Marcie Ryan specialize in?
Marcie Ryan is a physician assistant in Walnut Creek, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Marcie Ryan practice?
Marcie Ryan practices at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598. Marcie Ryan's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. Dmand AI also links Marcie Ryan to 1 hospital, 2 group practices and clinics and 1 medical group.
What is Marcie Ryan's office phone number?
The practice phone on file for Marcie Ryan is (925) 939-3000.
What is Marcie Ryan's medical license number?
Marcie Ryan holds California license 21387.
Which hospitals is Marcie Ryan affiliated with?
Marcie Ryan practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California. Dmand AI links Marcie Ryan to 1 more hospital.
What medical group is Marcie Ryan part of?
Marcie Ryan is linked to Stanford Medicine Partners. Dmand AI links Marcie Ryan to 1 more medical group.
Is Marcie Ryan board certified?
Yes. Marcie Ryan is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).
What drugs does Marcie Ryan prescribe most?
In 2024 Medicare Part D data, Marcie Ryan's most prescribed drugs by claims were Atorvastatin Calcium, Rosuvastatin Calcium and Levothyroxine Sodium.
Has Marcie Ryan received payments from drug or device companies?
CMS Open Payments shows $485 in general payments to Marcie Ryan from 13 companies from 2024 to 2025. The largest total came from Abbvie Inc.
How long has Marcie Ryan been practicing?
Marcie Ryan's NPI was assigned in 2006.
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