John Warren
- Medicare services, 2024
- 25,622
- Medicare patients, 2024
- 560
- Part D claims, 2024
- 30,187
- Hospital affiliations
- 2
- Industry payments
- $245
- Practice address
- 1100 Ruby Tyler Pkwy, Tuscaloosa, AL 35404-2959
- Practice phone
- Call (205) 759-2582
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Tuskaloosa Internal Medicine
Primary care practice · Tuscaloosa, Alabama
Find John Warren's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
John Warren is an internist in Tuscaloosa, Alabama
John Warren practices at Tuskaloosa Internal Medicine in Tuscaloosa, Alabama.
John Warren's NPI, 1013120104, was assigned on May 7, 2007. John Warren graduated from University of Alabama School of Medicine in 2008. John Warren holds Alabama license MD.27877.
- NPI
- 1013120104NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8921186628
- NPI enumeration date
- May 7, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (205) 759-2582
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
John Warren practices at Tuskaloosa Internal Medicine in Tuscaloosa, Alabama
John Warren's primary practice is Tuskaloosa Internal Medicine, at 1100 Ruby Tyler Pkwy, Tuscaloosa, AL 35404-2959. The practice phone is (205) 759-2582.
- Tuskaloosa Internal Medicine1100 Ruby Tyler Pkwy, Tuscaloosa, AL 35404-2959Phone(205) 759-2582
Source: Dmand AI Affiliation Data
John Warren is affiliated with 12 sites of care and 2 medical groups
John Warren's primary practice is Tuskaloosa Internal Medicine in Tuscaloosa, Alabama. John Warren is also affiliated with DCH Regional Medical Center. The medical group on file is Tuskaloosa Internal Medicine. Dmand AI also links John Warren to 1 more hospital, 5 home health agencies, 2 hospices, 1 group practice or clinic, 1 skilled nursing facility and 1 medical group, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at John Warren's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Warren practices, 12 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Tuskaloosa Internal Medicine | Available with a free account |
| +11 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
John Warren is one of 1,685 internists in Alabama
Internal medicine is John Warren's primary specialty in the NPI Registry, under taxonomy code 207R00000X. John Warren is licensed in Alabama.
Specialties and state licenses
- Internal medicine, AlabamaPrimary
Internists near John Warren
Counts of internists 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
John Warren billed Medicare for 25,622 services in 2024
CMS data shows 25,622 Medicare services from John Warren across 54 procedure codes in 2024, for 560 Medicare patients. Medicare paid $339,232 for them.
John Warren's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 10,4022024: 11,89514%
- Lab and pathology
- 2023: 7,7852024: 7,3226%
- Office and hospital visits
- 2023: 2,7082024: 2,5336%
- Other services
- 2023: 1,0112024: 1,68366%
- Surgery
- 2023: 1,5942024: 1,41311%
- Tests and treatments
- 2023: 5692024: 48315%
- Imaging
- 2023: 3522024: 29317%
Where John Warren's Medicare services took place, 2024
- In an office25,25099%
- In a facility3721%
John Warren compared with the Alabama median for internists, 2024
- John Warren
- Alabama median
- Medicare services
- 25,622vs 66438.6 times
- Medicare patients
- 560vs 2032.8 times
- Part D claims
- 29,272vs 50058.5 times
Medians across 1,610 internists in Alabama with Dmand AI profiles that report each measure.
John 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.
Need commercial claims for John Warren?
Medicare shows one payer. Book a meeting to get commercial claims data for John Warren and other internists in Alabama.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
John Warren treated 560 Medicare patients in 2024, average age 75
CMS counts 560 Medicare patients who saw John Warren in 2024. The largest group is 65 to 74, with 210 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 15% are also on Medicaid. Their average risk score is 1.51, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts John Warren's median patient age at 71, with 57% women.
John Warren's Medicare patients by age, 2024
John Warren's Medicare patients by sex, 2024
- Women32959%
- Men23141%
Chronic conditions among John Warren's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis62%
- Chronic kidney disease57%
- Mood disorders42%
- Depression41%
- Diabetes38%
- Anxiety30%
Share of Medicare patients with each condition. A patient can have several.
John 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 71
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
John Warren wrote 30,187 Medicare Part D claims in 2024
In 2024, John Warren wrote 30,187 Medicare Part D claims for 1,220 patients. 85% of them were for generic drugs. CMS names the drug for 29,272 of them, across 281 drugs with 11 or more claims each, at $2,550,815 in total drug cost. In 2023, CMS named 27,569 claims across 268 drugs.
John Warren's Part D claims by kind of drug, 2024
- Generic25,689 claims85%
- Brand-name4,271 claims14%
- Other227 claims1%
John 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 John Warren's Part D claims, 2024
- Opioids3%851 of 30,187 claims
- Antibiotics3%776 of 30,187 claims
- Antipsychotics, patients 65 and over1%225 of 30,187 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: 27,5692024: 29,2726%
Drugs named by CMS: 281 in 2024, 268 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 John Warren takes part in Medicare
John 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
John Warren received $245 in industry payments from 2019 to 2025
CMS Open Payments shows 14 general payments to John Warren from 9 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $58.
General payments to John Warren by program year, 2019 to 2025
Companies that paid John Warren the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
John Warren graduated from University of Alabama School of Medicine
John Warren graduated from University of Alabama School of Medicine in 2008.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for John 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 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) |
| Industry payments | Open Payments (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 John 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 John Warren's NPI number?
John Warren's NPI number is 1013120104. It was assigned on May 7, 2007, and it is active in the NPI Registry.
What does John Warren specialize in?
John Warren is an internist in Tuscaloosa, Alabama. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does John Warren practice?
John Warren practices at 1100 Ruby Tyler Pkwy, Tuscaloosa, AL 35404-2959. John Warren's primary practice is Tuskaloosa Internal Medicine in Tuscaloosa, Alabama. Dmand AI also links John Warren to 1 hospital, 5 home health agencies, 2 hospices, 1 group practice or clinic, 1 skilled nursing facility and 1 medical group.
What is John Warren's office phone number?
The practice phone on file for John Warren is (205) 759-2582.
What is John Warren's medical license number?
John Warren holds Alabama license MD.27877.
Which hospitals is John Warren affiliated with?
John Warren is affiliated with DCH Regional Medical Center. Dmand AI links John Warren to 1 more hospital.
What medical group is John Warren part of?
John Warren is linked to Tuskaloosa Internal Medicine. Dmand AI links John Warren to 1 more medical group.
Does John Warren accept Medicare?
Yes. CMS data shows John Warren billed Medicare for 25,622 services in 2024, and John Warren accepts Medicare assignment.
How many Medicare patients does John Warren see?
CMS counts 560 Medicare patients who saw John Warren in 2024, with an average age of 75.
What services does John Warren bill to Medicare?
In 2024, John Warren's most billed Medicare services were injected or infused drug (J1071), surgery: heart and blood vessels (36415) and lab and pathology test (80053).
Show 4 more questionsShow fewer questions
Where did John Warren go to medical school?
John Warren graduated from University of Alabama School of Medicine in 2008.
What drugs does John Warren prescribe most?
In 2024 Medicare Part D data, John Warren's most prescribed drugs by claims were Levothyroxine Sodium, Amlodipine Besylate and Atorvastatin Calcium.
Has John Warren received payments from drug or device companies?
CMS Open Payments shows $245 in general payments to John Warren from 9 companies from 2019 to 2025. The largest total came from Pfizer Inc.
How long has John Warren been practicing?
John Warren graduated from medical school in 2008, 18 years ago.
Selling to internal medicine practices?
See internists in Alabama by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card