Dr. Thomas Byron Alan, MD
- Medicare services, 2024
- 1,637
- Medicare patients, 2024
- 642
- Part D claims, 2024
- 6,820
- Hospital affiliations
- 2
- Industry payments
- $72
- Practice address
- 2660 W Covell Blvd, Davis, CA 95616
- Practice phone
- Call (530) 747-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Regents of the University of California
Davis, California
Find Dr. Alan'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.
Dr. Thomas Byron Alan is an internist in Davis, California
Dr. Alan practices at Regents of the University of California in Davis, California.
Dr. Alan's NPI, 1235115635, was assigned on December 16, 2005. Dr. Alan graduated from Creighton University School of Medicine - Omaha in 1996. Dr. Alan holds California license A85006.
- NPI
- 1235115635NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739179813
- NPI enumeration date
- December 16, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (530) 747-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas Byron Alan practices at Regents of the University of California in Davis, California
Dr. Alan's primary practice is Regents of the University of California, at 2660 W Covell Blvd, Davis, CA 95616 in Yolo County. The practice phone is (530) 747-3000.
- Regents of the University of California2660 W Covell Blvd, Davis, CA 95616 · Yolo CountyPhone(530) 747-3000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Thomas Byron Alan is affiliated with 7 sites of care and 1 medical group
Dr. Alan's primary practice is Regents of the University of California in Davis, California. Dr. Alan is also affiliated with Sutter Davis Hospital. The medical group on file is UC Davis Medical Group. Dmand AI also links Dr. Alan to 1 more hospital, 2 home health agencies, 1 group practice or clinic and 1 skilled nursing facility, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thomas Byron Alan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Alan practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Regents of the University of California | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas Byron Alan is one of 16,751 internists in California
Internal medicine is Dr. Alan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Alan is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Alan's licenses on file in 2 states: California and Illinois.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Illinois license
Clinical focus
Dmand AI lists acid reflux, acute kidney failure, acute sinusitis, acute skin infection, adjustment disease, alzheimer's disease, anxiety and aortic atherosclerois among the conditions Dr. Alan treats.
Internists near Dr. Alan
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
Dr. Thomas Byron Alan billed Medicare for 1,637 services in 2024
CMS data shows 1,637 Medicare services from Dr. Alan across 14 procedure codes in 2024, for 642 Medicare patients. Medicare paid $75,003 for them. Every service was in an office.
Dr. Alan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,0652024: 1,1558%
- Other services
- 2023: 2332024: 28824%
- Tests and treatments
- 2023: 1602024: 11230%
- Drugs given in the office
- 2023: 512024: 5814%
- Lab and pathology
- 2023: 02024: 13
- Surgery
- 2023: 362024: 1169%
Dr. Alan compared with the California median for internists, 2024
- Dr. Alan
- California median
- Medicare services
- 1,637vs 3614.5 times
- Medicare patients
- 642vs 1514.3 times
- Part D claims
- 6,042vs 42114.4 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Alan'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 Dr. Alan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Alan and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas Byron Alan treated 642 Medicare patients in 2024, average age 75
CMS counts 642 Medicare patients who saw Dr. Alan in 2024. The largest group is 65 to 74, with 301 patients. 73% of them have high cholesterol, and 57% have high blood pressure. 4% are also on Medicaid. Their average risk score is 1.07, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Alan's median patient age at 65, with 33% women.
Dr. Alan's Medicare patients by age, 2024
Dr. Alan's Medicare patients by sex, 2024
- Women27743%
- Men36557%
Chronic conditions among Dr. Alan's Medicare patients, 2024
- High cholesterol73%
- High blood pressure57%
- Arthritis39%
- Diabetes21%
- Ischemic heart disease19%
- Mood disorders18%
- Atrial fibrillation17%
- Depression17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Alan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women33%
- Men66%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas Byron Alan wrote 6,820 Medicare Part D claims in 2024
In 2024, Dr. Alan wrote 6,820 Medicare Part D claims for 844 patients. 86% of them were for generic drugs. CMS names the drug for 6,042 of them, across 148 drugs with 11 or more claims each, at $609,471 in total drug cost. In 2023, CMS named 5,844 claims across 140 drugs.
Dr. Alan's Part D claims by kind of drug, 2024
- Generic5,862 claims86%
- Brand-name921 claims14%
- Other37 claims1%
Dr. Alan'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. Alan's Part D claims, 2024
- Opioids3%213 of 6,820 claims
- Antibiotics3%211 of 6,820 claims
- Antipsychotics, patients 65 and over1%43 of 6,820 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: 5,8442024: 6,0423%
Drugs named by CMS: 148 in 2024, 140 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
Dr. Thomas Byron Alan ranks in the 60th percentile for removal of skin lesions in Medicare
Dr. Alan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Alan as offering telehealth. CMS counts 13 procedures of removal of skin lesions by Dr. Alan, more than 60% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Alan ranks in Medicare procedure volume
- Removal of skin lesions
- 60th percentile13 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Thomas Byron Alan received $72 in industry payments in 2019
CMS Open Payments shows 2 general payments to Dr. Alan from 1 drug or device company in 2019. Food and beverage make up the largest share, 100% of the total. Teleflex LLC paid the most, $72.
Companies that paid Dr. Alan the most, 2019 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas Byron Alan has 1 award and honors on record
Dmand AI lists 1 award for Dr. Alan, most recently CMS Stage 1 EHR in 2012.
Awards and honors for Dr. Alan
- 2012
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Thomas Byron Alan graduated from Creighton University School of Medicine - Omaha
Dr. Alan graduated from Creighton University School of Medicine - Omaha in 1996. Dr. Alan is a member of American College of Lifestyle Medicine.
- Medical school
- Board certified in internal medicine
- Board certified in md
Source: Dmand AI Professional Profile Data
Dr. Thomas Byron Alan accepts plans from 5 insurance carriers
Dr. Alan is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
Plan types Dr. Alan accepts, by number of carriers
- Medicare4
- PPO3
- HMO2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Thomas Byron Alan'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Thomas Byron Alan
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. Thomas Byron Alan's NPI number?
Dr. Thomas Byron Alan's NPI number is 1235115635. It was assigned on December 16, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Byron Alan?
Dr. Thomas Byron Alan is an internist in Davis, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Thomas Byron Alan practice?
Dr. Alan practices at 2660 W Covell Blvd, Davis, CA 95616. Dr. Alan's primary practice is Regents of the University of California in Davis, California. Dmand AI also links Dr. Alan to 1 hospital, 2 home health agencies, 1 group practice or clinic and 1 skilled nursing facility.
What is Dr. Thomas Byron Alan's office phone number?
The practice phone on file for Dr. Alan is (530) 747-3000.
What is Dr. Thomas Byron Alan's medical license number?
Dr. Alan holds California license A85006, one of the licenses on file in 2 states.
Which states has Dr. Thomas Byron Alan been licensed in?
Dmand AI has state licenses on file for Dr. Alan in California (2003 to 2027) and Illinois (1999 to 2005).
Which hospitals is Dr. Thomas Byron Alan affiliated with?
Dr. Alan is affiliated with Sutter Davis Hospital. Dmand AI links Dr. Alan to 1 more hospital.
What medical group is Dr. Thomas Byron Alan part of?
Dr. Alan is linked to UC Davis Medical Group.
Does Dr. Thomas Byron Alan accept Medicare?
Yes. CMS data shows Dr. Alan billed Medicare for 1,637 services in 2024, and Dr. Alan accepts Medicare assignment.
Does Dr. Thomas Byron Alan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Alan as offering telehealth services.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. Thomas Byron Alan see?
CMS counts 642 Medicare patients who saw Dr. Alan in 2024, with an average age of 75.
Is Dr. Thomas Byron Alan board certified?
Yes. Dr. Alan is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Thomas Byron Alan bill to Medicare?
In 2024, Dr. Alan's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G0439).
Where did Dr. Thomas Byron Alan go to medical school?
Dr. Alan graduated from Creighton University School of Medicine - Omaha in 1996.
What drugs does Dr. Thomas Byron Alan prescribe most?
In 2024 Medicare Part D data, Dr. Alan's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Amlodipine Besylate.
Has Dr. Thomas Byron Alan received payments from drug or device companies?
CMS Open Payments shows $72 in general payments to Dr. Alan from 1 company from 2019 to 2019. The largest total came from Teleflex LLC.
How long has Dr. Thomas Byron Alan been practicing?
Dr. Alan graduated from medical school in 1996, 30 years ago.
What insurance does Dr. Thomas Byron Alan accept?
Dr. Alan is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
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