NPPES file of Aug 9, 2026

Richard McNeill Guy, M.D.

Hematology & Oncology Physician · Sacramento, CA

Richard McNeill Guy, M.D. is a hematology & oncology physician with a practice address in Sacramento, California, and NPI 1578545190, issued on Nov 18, 2005. Check the license (California A74887, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1578545190
Name
Richard McNeill Guy
Credential
M.D.
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License number
A74887 CA
Self-reported in NPPES; status is on the state search
Practice location
4501 X St, Sacramento, CA 95817
Phone
(916) 734-3772
Enumerated
Nov 18, 2005
Record last updated
Dec 8, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(916) 734-7946
Medicare enrollment
Enrolled (PECOS I20060208000784); accepts Medicare assignment
Medical or professional school
University Of California, Geffen School Of Medicine, 1999
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →

Also registered at 4501 X St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Kristine Ahlberg, RNOncology Registered Nurse1982086567
  2. Danielle Baham, RDRegistered Dietitian1427533249
  3. Cheryl Breed, NPNurse Practitioner1760408959
  4. Laura Brennan, F.N.PFamily Nurse Practitioner1235389826
  5. Radha CanepaInternal Medicine Physician1760767511
  6. Sally Denardo, M.D.Internal Medicine Physician1568447878

Verify Richard McNeill Guy in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A74887    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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10% fewer Medicare Part D claims than the average hematology & oncology physician in 2024

790 Medicare Part D claims for 186 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 151 claims were for opioids.

  1. Richard Guy790
  2. Specialty average877

Most prescribed

  1. Prochlorperazine Maleate116 claims
  2. Ondansetron Hcl77 claims
  3. Hydrocodone-Acetaminophen60 claims
  4. Oxycodone Hcl51 claims
  5. Prednisone45 claims
  6. Famotidine38 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.

Bills Medicare through one group practice

  1. Permanente Medical Group IncRoseville, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Richard McNeill Guy among 1,583 hematology & oncology physician records in California

Richard McNeill Guy, M.D. is one of 1,583 hematology & oncology 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 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 92% newer
  • In a Medicare fileYes · 83% of these records are
  • In the CMS Doctors and Clinicians fileYes · 71% of these records are
  • Graduated1999 · median 2003 among the 1,124 with a school on file
  • Record last updated2021 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hematology & Oncology Physician providers in California

There are 1,583 hematology & oncology physician records in California.

All 1,583 in California → Every provider in Sacramento → Hematology & Oncology Physician nationwide →

The 8 hematology & oncology physician records with the nearest ZIP codes

  1. Mehrad Abedi, M.D.Sacramento, CA 958171467459222
  2. Helen Chew, M.D.Sacramento, CA 958171801870142
  3. David Gandara, M.D.Sacramento, CA 958171528042587
  4. Kit Lam, M.D., PH.D.Sacramento, CA 958171306829577
  5. Primo Lara, M.D.Sacramento, CA 958171972585743
  6. Derick Lau, M.D., PH.D.Sacramento, CA 958171801879077
  7. Robert O'Donnell, M.D., PH.D.Sacramento, CA 958171386627586
  8. Jerry Powell, M.D.Sacramento, CA 958171780666198

Common questions

What is Richard McNeill Guy, M.D.'s NPI number?

Richard McNeill Guy, M.D.'s National Provider Identifier (NPI) is 1578545190, issued on Nov 18, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Richard McNeill Guy, M.D. located?

The NPPES record lists a practice address at 4501 X St, Sacramento, CA, 95817. Phone: (916) 734-3772. Providers update this record themselves, so call before visiting.

How can I verify Richard McNeill Guy, M.D.'s license?

NPPES lists California license number A74887, 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 Richard McNeill Guy, M.D. prescribe under Medicare Part D?

In 2024, Richard McNeill Guy, M.D. had 790 Medicare Part D claims for 186 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.