Clinical CompetenceDisease ManagementEducation, Medical
Dr. Richard Chyan, MD
NPI1013406628PAC ID4284001017
- Medicare services, 2024
- 2,006
- Medicare patients, 2024
- 529
- Part D claims, 2024
- 718
- Publications
- 1
- MIPS score, 2024
- 19
- Practice address
- 101 E. Valencia Mesa Drive, Fullerton, CA 92835
- Practice phone
- Call (714) 578-8706
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St. Jude Medical Center - Unit
Acute Care Hospital-Unit · Fullerton, California
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Dr. Richard Chyan is a physiatrist in Fullerton, California
Dr. Chyan practices at St. Jude Medical Center - Unit in Fullerton, California.
Dr. Chyan's NPI, 1013406628, was assigned on May 9, 2018. Dr. Chyan graduated from Loma Linda University School Of Medicine in 2018. Dr. Chyan's California license number on file is A163678.
NPI and contact details
- NPI
- 1013406628NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4284001017
- NPI enumeration date
- May 9, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 578-8706
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Richard Chyan practices at St. Jude Medical Center - Unit in Fullerton, California
Dr. Chyan's primary practice is St. Jude Medical Center - Unit, at 101 E. Valencia Mesa Drive, Fullerton, CA 92835 in Orange County. The practice phone is (714) 578-8706.
- St. Jude Medical Center - Unit101 E. Valencia Mesa Drive, Fullerton, CA 92835 · Orange CountyPhone(714) 578-8706
Source: Dmand AI Affiliation Data
Dr. Richard Chyan is affiliated with 4 sites of care and 1 medical group
Dr. Chyan's primary practice is St. Jude Medical Center - Unit in Fullerton, California. Dr. Chyan is also affiliated with Providence St. Jude Medical Center. The medical group on file is ORCA Rehab. Dmand AI also links Dr. Chyan to 1 more hospital and 1 group practice or clinic, each named with a free account.
St. Jude Medical Center - UnitPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Richard Chyan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chyan practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. Jude Medical Center - Unit | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Richard Chyan is one of 1,234 physiatrists in California
Physical medicine and rehabilitation is Dr. Chyan's primary specialty in the NPI Registry, under taxonomy code 208100000X. Dr. Chyan is board certified in physical medicine & rehabilitation by the American Board of Physical Medicine and Rehabilitation. Dr. Chyan has a license on file in California.
Specialties and state licenses
- Physical medicine and rehabilitation, CaliforniaPrimary
Clinical focus
Dmand AI lists arthritis among the conditions Dr. Chyan treats.
Physiatrists near Dr. Chyan
Counts of physiatrists with a Dmand AI profile, by place and practice. Each opens the list.
1,234physiatrists in California
9physiatrists in Fullerton
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Richard Chyan billed Medicare for 2,006 services in 2024
CMS data shows 2,006 Medicare services from Dr. Chyan across 9 procedure codes in 2024, for 529 Medicare patients. Medicare paid $145,868 for them.
Medicare services, 20242,006
Medicare patients529
Paid by Medicare$145,868
Procedure codes9
Dr. Chyan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,8682024: 1,9866%
- Other services
- 2023: 02024: 20
Where Dr. Chyan's Medicare services took place, 2024
- In an office1889%
- In a facility1,81891%
Dr. Chyan compared with the California median for physiatrists, 2024
- Dr. Chyan
- California median
- Medicare services
- 2,006vs 8472.4 times
- Medicare patients
- 529vs 1523.5 times
- Part D claims
- 453vs 1183.8 times
Medians across 1,090 physiatrists in California with Dmand AI profiles that report each measure.
Dr. Chyan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chyan and other physiatrists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Richard Chyan treated 529 Medicare patients in 2024, average age 74
CMS counts 529 Medicare patients who saw Dr. Chyan in 2024. The largest group is 65 to 74, with 188 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 50% are also on Medicaid. Their average risk score is 3.10, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Chyan's median patient age at 71, with 52% women.
Medicare patients, 2024529
Average age74
Average risk score3.10
Also on Medicaid50%
Dr. Chyan's Medicare patients by age, 2024
Dr. Chyan's Medicare patients by sex, 2024
- Women27853%
- Men25147%
Chronic conditions among Dr. Chyan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis68%
- Mood disorders55%
- Depression53%
- Diabetes51%
- Anxiety49%
- Chronic kidney disease46%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chyan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women52%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Richard Chyan wrote 718 Medicare Part D claims in 2024
In 2024, Dr. Chyan wrote 718 Medicare Part D claims for 218 patients. 96% of them were for generic drugs. CMS names the drug for 453 of them, across 14 drugs with 11 or more claims each, at $6,439 in total drug cost. In 2023, CMS named 459 claims across 16 drugs.
Part D claims, 2024718
Drugs named by CMS14
Total drug cost$6,439
Part D patients218
Dr. Chyan's Part D claims by kind of drug, 2024
- Generic689 claims96%
- Brand-name and other29 claims4%
Dr. Chyan'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 Dr. Chyan's Part D claims, 2024
- Opioids20%144 of 718 claims
- Antibiotics4%26 of 718 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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4592024: 4531%
Drugs named by CMS: 14 in 2024, 16 in 2023.
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
Dr. Richard Chyan scored 19 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 19 out of 100 for Dr. Chyan for performance year 2024, reported individually. Dr. Chyan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Chyan's MIPS scores, performance year 2024
- 19of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 63of 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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Dr. Richard Chyan has 1 publication on record
Dmand AI links 1 paper to Dr. Chyan in 2017. Dr. Chyan's most frequent co-authors are Vi Am Dinh, MD, Andrew John Sumnicht, MD and Daniel Udrea, MD.
Papers1
Dr. Chyan's most frequent co-authors
Recent publications by Dr. Chyan
See who Dr. Chyan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chyan works with, so you can find a warm path to the right physiatrists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Richard Chyan received $98 in industry payments from 2023 to 2024
CMS Open Payments shows 4 general payments to Dr. Chyan from 3 drug and device companies from 2023 to 2024. Food and beverage make up the largest share, 100% of the total. ANI Pharmaceuticals, Inc. paid the most, $59.
General payments to Dr. Chyan by program year, 2023 to 2024
Companies that paid Dr. Chyan the most, 2023 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Richard Chyan graduated from Loma Linda University School Of Medicine
Dr. Chyan graduated from Loma Linda University School Of Medicine in 2018.
- Medical school
- Board certified in physical medicine & rehabilitation
Source: Dmand AI Professional Profile Data
Dr. Richard Chyan accepts plans from 12 insurance carriers
Dr. Chyan is in network with 12 carriers, including Aetna, United Healthcare and Elevance. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Elevance
- Blue Cross Blue Shield of Michigan
- HCSC
- Alliant Health Plans
- Aspirus Health Plan
- Blue Cross and Blue Shield of Kansas City
- +4 more carriersWith a free account
Plan types Dr. Chyan accepts, by number of carriers
- PPO7
- HMO6
- EPO4
- Medicare3
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Richard Chyan'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 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Richard Chyan
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. Richard Chyan's NPI number?
Dr. Richard Chyan's NPI number is 1013406628. It was assigned on May 9, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Richard Chyan?
Dr. Richard Chyan is a physiatrist in Fullerton, California. The primary specialty in the NPI Registry is Physical Medicine & Rehabilitation Physician (taxonomy code 208100000X).
Where does Dr. Richard Chyan practice?
Dr. Chyan practices at 101 E. Valencia Mesa Drive, Fullerton, CA 92835. Dr. Chyan's primary practice is St. Jude Medical Center - Unit in Fullerton, California. Dmand AI also links Dr. Chyan to 1 hospital and 1 group practice or clinic.
What is Dr. Richard Chyan's office phone number?
The practice phone on file for Dr. Chyan is (714) 578-8706.
What is Dr. Richard Chyan's medical license number?
Dr. Chyan's California license number on file is A163678.
Which hospitals is Dr. Richard Chyan affiliated with?
Dr. Chyan is affiliated with Providence St. Jude Medical Center. Dmand AI links Dr. Chyan to 2 more hospitals.
What medical group is Dr. Richard Chyan part of?
Dr. Chyan is linked to ORCA Rehab.
Does Dr. Richard Chyan accept Medicare?
Yes. CMS data shows Dr. Chyan billed Medicare for 2,006 services in 2024, and Dr. Chyan accepts Medicare assignment.
What is Dr. Richard Chyan's MIPS score?
Dr. Chyan's MIPS final score for performance year 2024 is 19 out of 100, reported individually.
How many Medicare patients does Dr. Richard Chyan see?
CMS counts 529 Medicare patients who saw Dr. Chyan in 2024, with an average age of 74.
Show 9 more questionsShow fewer questions
Is Dr. Richard Chyan board certified?
Yes. Dr. Chyan is board certified in physical medicine & rehabilitation by the American Board of Physical Medicine and Rehabilitation.
What services does Dr. Richard Chyan bill to Medicare?
In 2024, Dr. Chyan's most billed Medicare services were hospital inpatient care (99232), nursing facility care (99308) and hospital inpatient care (99223).
Where did Dr. Richard Chyan go to medical school?
Dr. Chyan graduated from Loma Linda University School Of Medicine in 2018.
What drugs does Dr. Richard Chyan prescribe most?
In 2024 Medicare Part D data, Dr. Chyan's most prescribed drugs by claims were Gabapentin, Hydrocodone-Acetaminophen and Naloxone HCl.
Has Dr. Richard Chyan received payments from drug or device companies?
CMS Open Payments shows $98 in general payments to Dr. Chyan from 3 companies from 2023 to 2024. The largest total came from ANI Pharmaceuticals, Inc.
How long has Dr. Richard Chyan been practicing?
Dr. Chyan graduated from medical school in 2018, 8 years ago.
Does Dr. Richard Chyan do research?
Dmand AI links 1 publication to Dr. Chyan.
Who does Dr. Richard Chyan publish with?
Dr. Chyan's most frequent co-authors are Vi Am Dinh, MD (1 shared paper), Andrew John Sumnicht, MD (1 shared paper) and Daniel Udrea, MD (1 shared paper).
What insurance does Dr. Richard Chyan accept?
Dr. Chyan is in network with 12 carriers, including Aetna, United Healthcare and Elevance. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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