Riannon Christa Atwater, MD
Hospitalist Physician · Denver, CO
Riannon Christa Atwater, MD is a hospitalist physician with a practice address in Denver, Colorado, and NPI 1952043374, issued on Apr 7, 2022. Check the license (Colorado DR.0077832, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Riannon Christa Atwater
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- DR.0077832 CO
Self-reported in NPPES; status is on the state search - Practice location
- 777 Bannock St, Denver, CO 80204
- Phone
- (303) 436-6000
- Enumerated
- Apr 7, 2022
- Record last updated
- May 27, 2026
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 806 in Colorado → Look up another NPI →
Also registered at 777 Bannock St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Shanie Adaime, RDHDental Hygienist1083318554
Verify Riannon Christa Atwater in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.0077832Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average hospitalist physician in 2024
541 Medicare Part D claims for 88 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Losartan Potassium28 claims
- Levothyroxine Sodium25 claims
- Metoprolol Succinate24 claims
- Atorvastatin Calcium22 claims
- Rosuvastatin Calcium22 claims
- Metformin Hcl19 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.
Riannon Christa Atwater among 806 hospitalist physician records in Colorado
Riannon Christa Atwater, MD is one of 806 hospitalist physician records with a practice address in Colorado. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 94% of them.
- NPI issued2022 · 94% of these records are older, 2% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileNo · 77% of these records are
- Record last updated2026 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Colorado
There are 806 hospitalist physician records in Colorado.
All 806 in Colorado → Every provider in Denver → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Rebecca Allyn, MDDenver, CO 802041386790962
- Carrie Brown, M.D.Denver, CO 802041790957892
- Philip Fung, MDDenver, CO 802041275795593
- Elizabeth Gillespie, MDDenver, CO 802041073669677
- Jennifer Lyden, MDDenver, CO 802041205099173
- Marshall Miller, MDDenver, CO 802041669528279
- David Mintzer, MDDenver, CO 802041386809861
- Mark Reid, MDDenver, CO 802041487736781
Common questions
What is Riannon Christa Atwater, MD's NPI number?
Riannon Christa Atwater, MD's National Provider Identifier (NPI) is 1952043374, issued on Apr 7, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Riannon Christa Atwater, MD located?
The NPPES record lists a practice address at 777 Bannock St, Denver, CO, 80204. Phone: (303) 436-6000. Providers update this record themselves, so call before visiting.
How can I verify Riannon Christa Atwater, MD's license?
NPPES lists Colorado license number DR.0077832, 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 Riannon Christa Atwater, MD prescribe under Medicare Part D?
In 2024, Riannon Christa Atwater, MD had 541 Medicare Part D claims for 88 beneficiaries; the average among hospitalist physician prescribers was 521. 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.