Dr. Thomas Byron Alan, MD

  • Davis, CA
  • Internist
NPI1235115635PAC ID9739179813
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
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Personal email
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Mobile number
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Social profiles

Primary practice

Regents of the University of California

Davis, California

See all 8 affiliations

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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 and contact details
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 California
    2660 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.

See all 8 affiliations for Dr. Alan

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.

EHR by site
SiteEHR vendor and product
Regents of the University of CaliforniaAvailable with a free account
+6 more affiliated sitesAvailable 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, CaliforniaPrimaryLicense A85006 · 2003 to 2027 · taxonomy 207R00000X
  • Illinois license1999 to 2005

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.

Medicare services, 20241,637
Medicare patients642
Paid by Medicare$75,003
Procedure codes14

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.

See all procedures by Dr. Alan

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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.

Medicare patients, 2024642
Average age75
Average risk score1.07
Also on Medicaid4%

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

  1. High cholesterol73%
  2. High blood pressure57%
  3. Arthritis39%
  4. Diabetes21%
  5. Ischemic heart disease19%
  6. Mood disorders18%
  7. Atrial fibrillation17%
  8. 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.

Part D claims, 20246,820
Drugs named by CMS148
Total drug cost$609,471
Part D patients844

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.

See all prescribing by Dr. Alan

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)

For MedTech and pharma teams

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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.

See all payments to Dr. Alan

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

  1. 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.

  1. Medical schoolCreighton University School of Medicine - Omaha
  2. Board certified in internal medicineAmerican Board of Internal Medicine
  3. Board certified in mdAmerican College of Lifestyle Medicine

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

  1. Medicare4
  2. PPO3
  3. HMO2
  4. POS2
  5. EPO1

Source: Dmand AI Insurance Network Data

Sources for Dr. Thomas Byron Alan's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand 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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