Joanne Hassing Ritvo, M.D.
Psychiatry Physician · Denver, CO
Joanne Hassing Ritvo, M.D. is a psychiatry physician with a practice address in Denver, Colorado, and NPI 1093788978, issued on Feb 9, 2006. Check the license (Colorado 21340, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Joanne Hassing Ritvo
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 21340 CO
Self-reported in NPPES; status is on the state search - Practice location
- 501 S Cherry St, Denver, CO 80246
- Phone
- (303) 329-0139
- Enumerated
- Feb 9, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (303) 399-0232
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 990 in Colorado → Look up another NPI →
Also registered at 501 S Cherry St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paula Armstrong, M.S, FNPNurse Practitioner1356455596
- Linda De Leon, AGPCNP-BCNurse Practitioner1841849171
- Steven Grabowski, MDPublic Health & General Preventive Medicine Physician1578655510
- Cynthia HarrisonMedical Art Specialist/Technologist1962969709
- Jane McCabe, APRN, CNSClinical Nurse Specialist1558448985
- Jonathan Ritvo, M.D.Addiction Psychiatry Physician1376516252
Verify Joanne Hassing Ritvo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 21340Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average psychiatry physician in 2024
39 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Venlafaxine Hcl Er11 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.
Joanne Hassing Ritvo among 990 psychiatry physician records in Colorado
Joanne Hassing Ritvo, M.D. is one of 990 psychiatry physician records with a practice address in Colorado. 65% 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, 62% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileNo · 35% of these records are
- Record last updated2026 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
291 psychiatry physician records list a practice address in Denver
They are 291 of the 25,068 NPPES records with a practice address in Denver, and 990 psychiatry physician records in Colorado.
All 990 in Colorado → Every provider in Denver → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Stephen Bishop, MDDenver, CO 802461346263860
- Gary Hoggan, M.D.Denver, CO 802461114950102
- Rebecca Lewin, MDDenver, CO 802461033224019
- Frederick Miller, M. D.Denver, CO 802461528160116
- William Niederhut, M.D.Denver, CO 802461982639084
- Rachel Norwood, MDDenver, CO 802461467539452
- Janice Petersen, MDDenver, CO 802461740351899
- Stephen Popkin, M.D.Denver, CO 802461326004797
Common questions
What is Joanne Hassing Ritvo, M.D.'s NPI number?
Joanne Hassing Ritvo, M.D.'s National Provider Identifier (NPI) is 1093788978, issued on Feb 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joanne Hassing Ritvo, M.D. located?
The NPPES record lists a practice address at 501 S Cherry St, Denver, CO, 80246. Phone: (303) 329-0139. Providers update this record themselves, so call before visiting.
How can I verify Joanne Hassing Ritvo, M.D.'s license?
NPPES lists Colorado license number 21340, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joanne Hassing Ritvo, M.D. prescribe under Medicare Part D?
In 2024, Joanne Hassing Ritvo, M.D. had 39 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. 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.
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.