Dr. Tannia Hernandez Joson, MD
- Medicare services, 2024
- 11
- Medicare patients, 2024
- 20
- Part D claims, 2020
- 64
- Hospital affiliations
- 1
- Industry payments
- $412
- Practice address
- 401 Bicentennial Way, Santa Rosa, CA 95403
- Practice phone
- Call (707) 571-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Joson's professional email, personal email and mobile number
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Dr. Tannia Hernandez Joson is an internist in Santa Rosa, California
Dr. Joson practices at Santa Rosa Medical Center in Santa Rosa, California, part of Kaiser Permanente.
Dr. Joson's NPI, 1598077125, was assigned on July 12, 2010. Dr. Joson holds Maryland license P25310.
- NPI
- 1598077125NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6507177078
- NPI enumeration date
- July 12, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 571-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- 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)
Dr. Tannia Hernandez Joson practices at Santa Rosa Medical Center in Santa Rosa, California
Dr. Joson's primary practice is Santa Rosa Medical Center, at 401 Bicentennial Way, Santa Rosa, CA 95403 in Sonoma County. The practice phone is (707) 571-4000.
- Santa Rosa Medical Center401 Bicentennial Way, Santa Rosa, CA 95403 · Sonoma CountyPhone(707) 571-4000
Source: Dmand AI Affiliation Data
Dr. Tannia Hernandez Joson is affiliated with 1 site of care and 1 medical group
Dr. Joson's primary practice is Santa Rosa Medical Center in Santa Rosa, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Tannia Hernandez Joson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Joson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Santa Rosa Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Tannia Hernandez Joson is one of 16,751 internists in California
Internal medicine is Dr. Joson's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Joson is licensed in Maryland.
Specialties and state licenses
- Internal medicine, MarylandPrimary
Internists near Dr. Joson
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. Tannia Hernandez Joson billed Medicare for 11 services in 2024
CMS data shows 11 Medicare services from Dr. Joson across 1 procedure code in 2024, for 20 Medicare patients. Medicare paid $1,171 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Joson's Medicare services by type, 2020 to 2024
- 2020
- 2024
- Office and hospital visits
- 2020: 2582024: 1196%
Dr. Joson compared with the California median for internists, 2024
- Dr. Joson
- California median
- Medicare services
- 11vs 36197% below
- Medicare patients
- 20vs 15187% below
- Part D claims
- 64vs 42185% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Joson'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. Joson?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Joson and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Tannia Hernandez Joson treated 20 Medicare patients in 2024, average age 71
CMS counts 20 Medicare patients who saw Dr. Joson in 2024. 70% of them have high blood pressure, and 55% have chronic kidney disease. Their average risk score is 3.07, 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. Joson's median patient age at 64, with 47% women.
Chronic conditions among Dr. Joson's Medicare patients, 2024
- High blood pressure70%
- Chronic kidney disease55%
Share of Medicare patients with each condition. A patient can have several.
Dr. Joson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women47%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Tannia Hernandez Joson wrote 64 Medicare Part D claims in 2020
In 2020, Dr. Joson wrote 64 Medicare Part D claims. Every claim was for a generic drug. They cover 4 drugs, with $908 in total drug cost. In 2019, CMS named 255 claims across 14 drugs.
Dr. Joson's most prescribed drugs by claims, 2020
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, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 2552020: 6475%
Drugs named by CMS: 4 in 2020, 14 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Tannia Hernandez Joson takes part in Medicare
Dr. Joson 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. Tannia Hernandez Joson received $412 in industry payments from 2016 to 2019
CMS Open Payments shows 29 general payments to Dr. Joson from 16 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $62.
General payments to Dr. Joson by program year, 2016 to 2019
General payments to Dr. Joson by kind, 2016 to 2019
- Food and beverage$411100%
- Education$10%
Companies that paid Dr. Joson the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Tannia Hernandez Joson'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) |
| 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) |
| 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. Tannia Hernandez Joson
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What is Dr. Tannia Hernandez Joson's NPI number?
Dr. Tannia Hernandez Joson's NPI number is 1598077125. It was assigned on July 12, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Tannia Hernandez Joson?
Dr. Tannia Hernandez Joson is an internist in Santa Rosa, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Tannia Hernandez Joson practice?
Dr. Joson practices at 401 Bicentennial Way, Santa Rosa, CA 95403. Dr. Joson's primary practice is Santa Rosa Medical Center in Santa Rosa, California, part of Kaiser Permanente.
What is Dr. Tannia Hernandez Joson's office phone number?
The practice phone on file for Dr. Joson is (707) 571-4000.
What is Dr. Tannia Hernandez Joson's medical license number?
Dr. Joson holds Maryland license P25310.
Which hospitals is Dr. Tannia Hernandez Joson affiliated with?
Dr. Joson practices at Santa Rosa Medical Center in Santa Rosa, California.
What medical group is Dr. Tannia Hernandez Joson part of?
Dr. Joson is linked to The Permanente Medical Group, Inc.
Does Dr. Tannia Hernandez Joson accept Medicare?
Yes. CMS data shows Dr. Joson billed Medicare for 11 services in 2024, and Dr. Joson accepts Medicare assignment.
How many Medicare patients does Dr. Tannia Hernandez Joson see?
CMS counts 20 Medicare patients who saw Dr. Joson in 2024, with an average age of 71.
What services does Dr. Tannia Hernandez Joson bill to Medicare?
In 2024, Dr. Joson's most billed Medicare services were hospital inpatient care (99222).
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What drugs does Dr. Tannia Hernandez Joson prescribe most?
In 2020 Medicare Part D data, Dr. Joson's most prescribed drugs by claims were Tamsulosin HCl, Lactulose and Amlodipine Besylate.
Has Dr. Tannia Hernandez Joson received payments from drug or device companies?
CMS Open Payments shows $412 in general payments to Dr. Joson from 16 companies from 2016 to 2019. The largest total came from Pfizer Inc.
How long has Dr. Tannia Hernandez Joson been practicing?
Dr. Joson graduated from medical school in 2008, 18 years ago.
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