Dr. Otis Upson Warren, MD
- Medicare services, 2024
- 295
- Medicare patients, 2024
- 307
- Part D claims, 2024
- 122
- Hospital affiliations
- 3
- Medical groups
- 3
- Practice address
- 164 Summit Avenue, Providence, RI 02906
- Practice phone
- Call (401) 793-2500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Otis Upson Warren is an emergency medicine physician in Providence, Rhode Island
Dr. Warren practices at The Miriam Hospital in Providence, Rhode Island, part of Brown University Health.
Dr. Warren's NPI, 1285898890, was assigned on July 12, 2008. Dr. Warren graduated from Perelman School of Med at the University of Pennsylvania in 2005. Dr. Warren holds Rhode Island license MD12935.
- NPI
- 1285898890NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9537216775
- NPI enumeration date
- July 12, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (401) 793-2500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Otis Upson Warren practices at The Miriam Hospital in Providence, Rhode Island
Dr. Warren's primary practice is The Miriam Hospital, at 164 Summit Avenue, Providence, RI 02906 in Providence County. The practice phone is (401) 793-2500.
- The Miriam Hospital164 Summit Avenue, Providence, RI 02906 · Providence CountyPhone(401) 793-2500
Source: Dmand AI Affiliation Data
Dr. Otis Upson Warren is affiliated with 3 sites of care and 3 medical groups
Dr. Warren's primary practice is The Miriam Hospital in Providence, Rhode Island, part of Brown University Health. Dr. Warren is also affiliated with Rhode Island Hospital. The medical group on file is Brown Emergency Medicine. Dmand AI also links Dr. Warren to 1 more hospital and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Otis Upson Warren's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Warren practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| The Miriam Hospital | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Otis Upson Warren is one of 262 emergency medicine physicians in Rhode Island
Emergency medicine is Dr. Warren's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Warren's licenses on file in 2 states: Rhode Island and California.
Specialties and state licenses
- Emergency medicine, Rhode IslandPrimary
- Emergency medical services (emergency medicine), California
Emergency medicine physicians near Dr. Warren
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Otis Upson Warren billed Medicare for 295 services in 2024
CMS data shows 295 Medicare services from Dr. Warren across 6 procedure codes in 2024, for 307 Medicare patients. Medicare paid $33,618 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Warren's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3152024: 2956%
Dr. Warren compared with the Rhode Island median for emergency medicine physicians, 2024
- Dr. Warren
- Rhode Island median
- Medicare services
- 295vs 20246% above
- Medicare patients
- 307vs 23232% above
- Part D claims
- 11vs 2454% below
Medians across 242 emergency medicine physicians in Rhode Island with Dmand AI profiles that report each measure.
Dr. Warren'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Otis Upson Warren treated 307 Medicare patients in 2024, average age 76
CMS counts 307 Medicare patients who saw Dr. Warren in 2024. The largest group is 75 to 84, with 122 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 18% are also on Medicaid. Their average risk score is 1.74, 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. Warren's median patient age at 51, with 65% women.
Dr. Warren's Medicare patients by age, 2024
Dr. Warren's Medicare patients by sex, 2024
- Women17256%
- Men13544%
Chronic conditions among Dr. Warren's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis59%
- Anxiety46%
- Mood disorders43%
- Ischemic heart disease38%
- Depression37%
- Chronic kidney disease36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Warren's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women65%
- Men34%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Otis Upson Warren wrote 122 Medicare Part D claims in 2024
In 2024, Dr. Warren wrote 122 Medicare Part D claims for 82 patients. 93% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $29 in total drug cost. In 2023, CMS named 67 claims across 4 drugs.
Dr. Warren's Part D claims by kind of drug, 2024
- Generic113 claims93%
- Brand-name and other9 claims7%
Dr. Warren'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. Warren's Part D claims, 2024
- Opioids12%15 of 122 claims
- Antibiotics25%30 of 122 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: 672024: 1184%
Drugs named by CMS: 1 in 2024, 4 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
How Dr. Otis Upson Warren takes part in Medicare
Dr. Warren accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Otis Upson Warren graduated from Perelman School of Med at the University of Pennsylvania
Dr. Warren graduated from Perelman School of Med at the University of Pennsylvania in 2005.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Otis Upson Warren'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 DataDmand AI Org Hierarchy 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) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Otis Upson Warren
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. Otis Upson Warren's NPI number?
Dr. Otis Upson Warren's NPI number is 1285898890. It was assigned on July 12, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Otis Upson Warren?
Dr. Otis Upson Warren is an emergency medicine physician in Providence, Rhode Island. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Otis Upson Warren practice?
Dr. Warren practices at 164 Summit Avenue, Providence, RI 02906. Dr. Warren's primary practice is The Miriam Hospital in Providence, Rhode Island, part of Brown University Health. Dmand AI also links Dr. Warren to 1 hospital and 2 medical groups.
What is Dr. Otis Upson Warren's office phone number?
The practice phone on file for Dr. Warren is (401) 793-2500.
What is Dr. Otis Upson Warren's medical license number?
Dr. Warren holds Rhode Island license MD12935, one of the licenses on file in 2 states.
Which states has Dr. Otis Upson Warren been licensed in?
Dmand AI has state licenses on file for Dr. Warren in Rhode Island and California.
Which hospitals is Dr. Otis Upson Warren affiliated with?
Dr. Warren practices at The Miriam Hospital in Providence, Rhode Island. Dr. Warren is also affiliated with Rhode Island Hospital. Dmand AI links Dr. Warren to 1 more hospital.
What medical group is Dr. Otis Upson Warren part of?
Dr. Warren is linked to Brown Emergency Medicine. Dmand AI links Dr. Warren to 2 more medical groups.
Does Dr. Otis Upson Warren accept Medicare?
Yes. CMS data shows Dr. Warren billed Medicare for 295 services in 2024, and Dr. Warren accepts Medicare assignment.
How many Medicare patients does Dr. Otis Upson Warren see?
CMS counts 307 Medicare patients who saw Dr. Warren in 2024, with an average age of 76.
Show 4 more questionsShow fewer questions
What services does Dr. Otis Upson Warren bill to Medicare?
In 2024, Dr. Warren's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and hospital inpatient care (99239).
Where did Dr. Otis Upson Warren go to medical school?
Dr. Warren graduated from Perelman School of Med at the University of Pennsylvania in 2005.
What drugs does Dr. Otis Upson Warren prescribe most?
In 2024 Medicare Part D data, Dr. Warren's most prescribed drugs by claims were Oxycodone-Acetaminophen.
How long has Dr. Otis Upson Warren been practicing?
Dr. Warren graduated from medical school in 2005, 21 years ago.
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