Matthew Sims Fiess, PA
- Medicare patients, 2024
- 22
- Part D claims, 2024
- 3,023
- MIPS score, 2024
- 85
- Hospital affiliations
- 3
- Industry payments
- $15
- Practice address
- 1441 Constitution Boulevard, Salinas, CA 93906
- Practice phone
- Call (831) 755-4111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Matthew Fiess' professional email, personal email and mobile number
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Matthew Sims Fiess is a physician assistant in Salinas, California
Matthew Fiess practices at Natividad in Salinas, California, part of Monterey County, CA.
Matthew Fiess' NPI, 1477080869, was assigned on May 16, 2017. Matthew Fiess holds California license 54480.
- NPI
- 1477080869NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941579304
- NPI enumeration date
- May 16, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (831) 755-4111
- 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; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Matthew Sims Fiess practices at Natividad in Salinas, California
Matthew Fiess' primary practice is Natividad, at 1441 Constitution Boulevard, Salinas, CA 93906 in Monterey County. The practice phone is (831) 755-4111.
- Natividad1441 Constitution Boulevard, Salinas, CA 93906 · Monterey CountyPhone(831) 755-4111
Source: Dmand AI Affiliation Data
Matthew Sims Fiess is affiliated with 5 sites of care and 4 medical groups
Matthew Fiess' primary practice is Natividad in Salinas, California, part of Monterey County, CA. Matthew Fiess is also affiliated with Salinas Valley Health Medical Center. The medical group on file is Taylor Farms Family Health & Wellness Center. Dmand AI also links Matthew Fiess to 1 more hospital, 3 medical groups, 1 group practice or clinic and 1 rural health clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Matthew Sims Fiess' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Matthew Fiess practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Natividad | Available with a free account |
| +4 more sites and 3 medical groups | 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 Monterey County, CA and 6.2K+ hospitals, with verified contacts in the same login.
Matthew Sims Fiess is one of 11,482 physician assistants in California
Physician assistant is Matthew Fiess' primary specialty in the NPI Registry, under taxonomy code 363A00000X. Matthew Fiess is licensed in California.
Specialties and state licenses
- Physician assistant, CaliforniaPrimary
Physician assistants near Matthew Fiess
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
Matthew Sims Fiess treated 22 Medicare patients in 2024, average age 72
CMS counts 22 Medicare patients who saw Matthew Fiess in 2024. 75% of them have high cholesterol, and 73% have high blood pressure. Their average risk score is 1.18, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Matthew Fiess' median patient age at 38, with 54% women.
Chronic conditions among Matthew Fiess' Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
Share of Medicare patients with each condition. A patient can have several.
Matthew Fiess' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 38
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Matthew Sims Fiess wrote 3,023 Medicare Part D claims in 2024
In 2024, Matthew Fiess wrote 3,023 Medicare Part D claims for 425 patients. 86% of them were for generic drugs.
Matthew Fiess' Part D claims by kind of drug, 2024
- Generic2,607 claims86%
- Brand-name389 claims13%
- Other27 claims1%
Drug classes CMS tracks in Matthew Fiess' Part D claims, 2024
- Opioids0%15 of 3,023 claims
- Antibiotics2%58 of 3,023 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Matthew Sims Fiess scored 85 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 85 out of 100 for Matthew Fiess for performance year 2024, reported as part of a group. Matthew Fiess accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Matthew Fiess' MIPS scores, performance year 2024
- 85of 100Final score
- 67.2of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 68of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Matthew Sims Fiess received $15 in industry payments in 2025
CMS Open Payments shows 1 general payment to Matthew Fiess from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. ViiV Healthcare Company paid the most, $15.
Companies that paid Matthew Fiess the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Matthew Sims Fiess'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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Matthew Sims Fiess
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Matthew Sims Fiess' NPI number?
Matthew Sims Fiess' NPI number is 1477080869. It was assigned on May 16, 2017, and it is active in the NPI Registry.
What does Matthew Sims Fiess specialize in?
Matthew Sims Fiess is a physician assistant in Salinas, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Matthew Sims Fiess practice?
Matthew Fiess practices at 1441 Constitution Boulevard, Salinas, CA 93906. Matthew Fiess' primary practice is Natividad in Salinas, California, part of Monterey County, CA. Dmand AI also links Matthew Fiess to 1 hospital, 3 medical groups, 1 group practice or clinic and 1 rural health clinic.
What is Matthew Sims Fiess' office phone number?
The practice phone on file for Matthew Fiess is (831) 755-4111.
What is Matthew Sims Fiess' medical license number?
Matthew Fiess holds California license 54480.
Which hospitals is Matthew Sims Fiess affiliated with?
Matthew Fiess practices at Natividad in Salinas, California. Matthew Fiess is also affiliated with Salinas Valley Health Medical Center. Dmand AI links Matthew Fiess to 1 more hospital.
What medical group is Matthew Sims Fiess part of?
Matthew Fiess is linked to Taylor Farms Family Health & Wellness Center. Dmand AI links Matthew Fiess to 3 more medical groups.
Does Matthew Sims Fiess accept Medicare?
Yes. CMS lists Matthew Fiess as accepting Medicare assignment.
What is Matthew Sims Fiess' MIPS score?
Matthew Fiess' MIPS final score for performance year 2024 is 85 out of 100, reported as part of a group.
How many Medicare patients does Matthew Sims Fiess see?
CMS counts 22 Medicare patients who saw Matthew Fiess in 2024, with an average age of 72.
Has Matthew Sims Fiess received payments from drug or device companies?
CMS Open Payments shows $15 in general payments to Matthew Fiess from 1 company from 2025 to 2025. The largest total came from ViiV Healthcare Company.
How long has Matthew Sims Fiess been practicing?
Matthew Fiess graduated from medical school in 2017, 9 years ago.
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