Rainier Mark Enrique Guiang, M.D.
Pain Medicine (Anesthesiology) Physician · Riverside, CA
Rainier Mark Enrique Guiang, M.D. is a pain medicine (anesthesiology) physician with a practice address in Riverside, California, and NPI 1548217821, issued on May 30, 2006. Check the license (California A84296, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rainier Mark Enrique Guiang
- Credential
- M.D.
- Primary taxonomy
- Pain Medicine (Anesthesiology) Physician 207LP2900X
- License number
- A84296 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6900 Brockton Ave, Riverside, CA 92506
- Phone
- (951) 784-7111
- Enumerated
- May 30, 2006
- Record last updated
- May 14, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (866) 287-0329
- Medicaid ID
- 00A842960 CA
- Medicare enrollment
- Enrolled (PECOS I20070122000382); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pain medicine (anesthesiology) physician records → All 536 in California → Look up another NPI →
Also registered at 6900 Brockton Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Rainier Mark Enrique Guiang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A84296Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% more Medicare Part D claims than the average pain medicine (anesthesiology) physician in 2024
3,172 Medicare Part D claims for 908 beneficiaries, against an average of 1,750 among the 2,982 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims. 1,341 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen661 claims
- Gabapentin530 claims
- Tramadol Hcl296 claims
- Methylprednisolone214 claims
- Meloxicam193 claims
- Oxycodone-Acetaminophen163 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): 81.2 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).
Industry payments in 2024: $381.23
11 payments; by number, the most common kind was food and beverage; the largest payer was Boston Scientific Corporation. The 2,789 providers of this specialty with any payment received $3,225.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- University Pain Consultants Inc.Corona, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rainier Mark Enrique Guiang among 536 pain medicine (anesthesiology) physician records in California
Rainier Mark Enrique Guiang, M.D. is one of 536 pain medicine (anesthesiology) 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 57% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1999 · median 2004 among the 367 with a school on file
- Record last updated2013 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207LP2900X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pain Medicine (Anesthesiology) Physician providers in California
There are 536 pain medicine (anesthesiology) physician records in California.
All 536 in California → Every provider in Riverside → Pain Medicine (Anesthesiology) Physician nationwide →
The 8 pain medicine (anesthesiology) physician records with the nearest ZIP codes
- Sorosch Didehvar, M.D.Riverside, CA 925061598027005
- Suzanne Hyun, M.D.Riverside, CA 925061770927949
- Gary Pang, M.D.Riverside, CA 925061851486310
- Nitin Dhamija, M.D.Riverside, CA 925051104067339
- Mohammad Khan, M.D.Riverside, CA 925051922008143
- Helen Kim, MDRiverside, CA 925051699923698
- Rebecca PatchinRiverside, CA 925071821059866
- Stanley Eosakul, M.D.Lake Elsinore, CA 925321588003529
Common questions
What is Rainier Mark Enrique Guiang, M.D.'s NPI number?
Rainier Mark Enrique Guiang, M.D.'s National Provider Identifier (NPI) is 1548217821, issued on May 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Rainier Mark Enrique Guiang, M.D. located?
The NPPES record lists a practice address at 6900 Brockton Ave, Riverside, CA, 92506. Phone: (951) 784-7111. Providers update this record themselves, so call before visiting.
How can I verify Rainier Mark Enrique Guiang, M.D.'s license?
NPPES lists California license number A84296, 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 Rainier Mark Enrique Guiang, M.D. prescribe under Medicare Part D?
In 2024, Rainier Mark Enrique Guiang, M.D. had 3,172 Medicare Part D claims for 908 beneficiaries; the average among pain medicine (anesthesiology) physician prescribers was 1,750. Part D covers Medicare prescriptions only.
What is Rainier Mark Enrique Guiang, M.D.'s MIPS final score?
The 2023 MIPS final score is 81.2 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.