Adv Exp Med Biol
Acquired Immunodeficiency SyndromeBlood Cell CountCalifornia
Dr. Timothy P. Mess, MD
NPI1043280076
- Medicare services, 2024
- 311
- Medicare patients, 2024
- 95
- Part D claims, 2024
- 12
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 18321 Clark Street, Tarzana, CA 91356
- Practice phone
- Call (818) 881-0800
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Mess' 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. Timothy P. Mess is an infectious disease specialist in Tarzana, California
Dr. Mess practices at Providence Cedars-Sinai Tarzana Medical Center in Tarzana, California, part of Providence Health & Services.
Dr. Mess' NPI, 1043280076, was assigned on January 23, 2006. Dr. Mess graduated from University of Toledo College of Medicine and Life Sciences in 1980. Dr. Mess holds California license G46553.
NPI and contact details
- NPI
- 1043280076NPI Registry (opens in a new tab)
- NPI enumeration date
- January 23, 2006
- NPI status
- Active
- Practice phone
- (818) 881-0800
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 72
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Timothy P. Mess practices at Providence Cedars-Sinai Tarzana Medical Center in Tarzana, California
Dr. Mess' primary practice is Providence Cedars-Sinai Tarzana Medical Center, at 18321 Clark Street, Tarzana, CA 91356 in Los Angeles County. The practice phone is (818) 881-0800.
- Providence Cedars-Sinai Tarzana Medical Center18321 Clark Street, Tarzana, CA 91356 · Los Angeles CountyPhone(818) 881-0800
Source: Dmand AI Affiliation Data
Dr. Timothy P. Mess is affiliated with 1 site of care
Dr. Mess' primary practice is Providence Cedars-Sinai Tarzana Medical Center in Tarzana, California, part of Providence Health & Services. Dr. Mess' employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Timothy P. Mess' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mess practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence Cedars-Sinai Tarzana Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Timothy P. Mess is one of 1,054 infectious disease specialists in California
Infectious disease is Dr. Mess' primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Mess is licensed in California.
Specialties and state licenses
- Infectious disease, CaliforniaPrimary
Infectious disease specialists near Dr. Mess
Counts of infectious disease specialists with a Dmand AI profile, by place and practice. Each opens the list.
1,054infectious disease specialists in California
4infectious disease specialists in Tarzana
3infectious disease specialists at Providence Cedars-Sinai Tarzana Medical CenterSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Timothy P. Mess billed Medicare for 311 services in 2024
CMS data shows 311 Medicare services from Dr. Mess across 4 procedure codes in 2024, for 95 Medicare patients. Medicare paid $25,682 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024311
Medicare patients95
Paid by Medicare$25,682
Procedure codes4
Dr. Mess' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,0072024: 31169%
Dr. Mess compared with the California median for infectious disease specialists, 2024
- Dr. Mess
- California median
- Medicare services
- 311vs 42928% below
- Medicare patients
- 95vs 18047% below
- Part D claims
- 16vs 11987% below
Medians across 930 infectious disease specialists in California with Dmand AI profiles that report each measure.
Dr. Mess' 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. Mess?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mess and other infectious disease specialists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Timothy P. Mess treated 95 Medicare patients in 2024, average age 81
CMS counts 95 Medicare patients who saw Dr. Mess in 2024. The largest group is 75 to 84, with 46 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 18% are also on Medicaid. Their average risk score is 2.85, 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. Mess' median patient age at 72, with 38% women.
Medicare patients, 202495
Average age81
Average risk score2.85
Also on Medicaid18%
Dr. Mess' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mess' Medicare patients by sex, 2024
- Women4244%
- Men5356%
Chronic conditions among Dr. Mess' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis74%
- Ischemic heart disease65%
- Heart failure60%
- Chronic kidney disease56%
- Mood disorders55%
- Depression53%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mess' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women38%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Timothy P. Mess wrote 12 Medicare Part D claims in 2024
In 2024, Dr. Mess wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $2,180 in total drug cost. In 2020, CMS named 27 claims across 2 drugs.
Part D claims, 202412
Drugs named by CMS1
Total drug cost$2,180
Dr. Mess' most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2020 to 2023
- 2020
- 2023
- Claims for drugs CMS names
- 2020: 272023: 1641%
Drugs named by CMS: 1 in 2023, 2 in 2020.
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
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Dr. Timothy P. Mess has 1 publication on record
Dmand AI links 1 paper to Dr. Mess. Dr. Mess' most frequent co-authors are Donald Ira Abrams, MD and Paul A. Volberding, MD.
Papers1
Dr. Mess' most frequent co-authors
Recent publications by Dr. Mess
See who Dr. Mess researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Mess works with, so you can find a warm path to the right infectious disease specialists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Timothy P. Mess received $1,554 in industry payments from 2016 to 2019
CMS Open Payments shows 83 general payments to Dr. Mess from 7 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 94% of the total. ViiV Healthcare Company paid the most, $707.
General payments to Dr. Mess by program year, 2016 to 2019
General payments to Dr. Mess by kind, 2016 to 2019
$1.6Kin total
- Food and beverage$1,46494%
- Education$906%
Companies that paid Dr. Mess the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Timothy P. Mess graduated from University of Toledo College of Medicine and Life Sciences
Dr. Mess graduated from University of Toledo College of Medicine and Life Sciences in 1980.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Timothy P. Mess accepts plans from 7 insurance carriers
Dr. Mess is in network with 7 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
- Molina
Plan types Dr. Mess accepts, by number of carriers
- Medicare7
- PPO5
- HMO2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Timothy P. Mess'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Timothy P. Mess
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. Timothy P. Mess' NPI number?
Dr. Timothy P. Mess' NPI number is 1043280076. It was assigned on January 23, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Timothy P. Mess?
Dr. Timothy P. Mess is an infectious disease specialist in Tarzana, California. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. Timothy P. Mess practice?
Dr. Mess practices at 18321 Clark Street, Tarzana, CA 91356. Dr. Mess' primary practice is Providence Cedars-Sinai Tarzana Medical Center in Tarzana, California, part of Providence Health & Services.
What is Dr. Timothy P. Mess' office phone number?
The practice phone on file for Dr. Mess is (818) 881-0800.
What is Dr. Timothy P. Mess' medical license number?
Dr. Mess holds California license G46553.
Which hospitals is Dr. Timothy P. Mess affiliated with?
Dr. Mess practices at Providence Cedars-Sinai Tarzana Medical Center in Tarzana, California.
Does Dr. Timothy P. Mess accept Medicare?
Yes. CMS data shows Dr. Mess billed Medicare for 311 services in 2024.
How many Medicare patients does Dr. Timothy P. Mess see?
CMS counts 95 Medicare patients who saw Dr. Mess in 2024, with an average age of 81.
What services does Dr. Timothy P. Mess bill to Medicare?
In 2024, Dr. Mess' most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99223).
Where did Dr. Timothy P. Mess go to medical school?
Dr. Mess graduated from University of Toledo College of Medicine and Life Sciences in 1980.
Show 6 more questionsShow fewer questions
What drugs does Dr. Timothy P. Mess prescribe most?
In 2023 Medicare Part D data, Dr. Mess' most prescribed drugs by claims were Vancomycin HCl.
Has Dr. Timothy P. Mess received payments from drug or device companies?
CMS Open Payments shows $1,554 in general payments to Dr. Mess from 7 companies from 2016 to 2019. The largest total came from ViiV Healthcare Company.
How long has Dr. Timothy P. Mess been practicing?
Dr. Mess graduated from medical school in 1980, 46 years ago.
Does Dr. Timothy P. Mess do research?
Dmand AI links 1 publication to Dr. Mess.
Who does Dr. Timothy P. Mess publish with?
Dr. Mess' most frequent co-authors are Donald Ira Abrams, MD (1 shared paper) and Paul A. Volberding, MD (1 shared paper).
What insurance does Dr. Timothy P. Mess accept?
Dr. Mess is in network with 7 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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