Dr. Jonathan Edward Tammela, MD

  • Santa Maria, CA
  • Gynecologic oncologist
NPI1265451058PAC ID2668406315
Medicare services, 2024
189
Medicare patients, 2024
132
Part D claims, 2022
12
Publications
13
Clinical trials
6
Practice address
1400 E Church St, Santa Maria, CA 93454
Practice phone
Call (805) 739-3100
Professional email
Get professional email
Personal email
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Mobile number
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Social profiles

Primary practice

Dignity Health - Marian Regional Medical Center

Hospital · Santa Maria, California

See all 6 affiliations

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Dr. Jonathan Edward Tammela is a gynecologic oncologist in Santa Maria, California

Dr. Tammela practices at Dignity Health - Marian Regional Medical Center in Santa Maria, California, part of CommonSpirit Health.

Dr. Tammela's NPI, 1265451058, was assigned on July 19, 2006. Dr. Tammela graduated from Indiana University School Of Medicine in 1998. Dr. Tammela's Wisconsin license number on file is 48350.

NPI and contact details
Medicare PAC ID
2668406315
NPI enumeration date
July 19, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(805) 739-3100
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Male
Estimated age
54
Medical school graduation
1998

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Jonathan Edward Tammela practices at Dignity Health - Marian Regional Medical Center in Santa Maria, California

Dr. Tammela's primary practice is Dignity Health - Marian Regional Medical Center, at 1400 E Church St, Santa Maria, CA 93454 in Santa Barbara County. The practice phone is (805) 739-3100.

Source: Dmand AI Affiliation Data

Dr. Jonathan Edward Tammela is affiliated with 4 sites of care and 2 medical groups

Dr. Tammela's primary practice is Dignity Health - Marian Regional Medical Center in Santa Maria, California, part of CommonSpirit Health. Dr. Tammela is also affiliated with Dignity Health - French Hospital Medical Center. The medical group on file is Pacific Central Coast Health Centers Medical Group. Dmand AI also links Dr. Tammela to 1 more hospital, 1 group practice or clinic and 1 medical group, each named with a free account.

See all 6 affiliations for Dr. Tammela

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Jonathan Edward Tammela's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tammela practices, 4 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Dignity Health - Marian Regional Medical CenterAvailable with a free account
+3 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Jonathan Edward Tammela is one of 178 gynecologic oncologists in California

Gynecologic oncology is Dr. Tammela's primary specialty in the NPI Registry, under taxonomy code 207VX0201X. Dr. Tammela is board certified in gynecologic oncology by the American Board of Obstetrics and Gynecology. Dmand AI has Dr. Tammela's licenses on file in 4 states: Wisconsin, California, Florida and New York.

Specialties and state licenses

  • Gynecologic oncology, WisconsinPrimaryLicense 48350 · 2005 to 2019 · taxonomy 207VX0201X
  • California license2018 to 2027
  • Florida license1999 to 2007
  • New York license2002 to 2007

Clinical focus

Dmand AI lists hysterectomy, menopause and ovarian cyst among the conditions Dr. Tammela treats.

Gynecologic oncologists near Dr. Tammela

Counts of gynecologic oncologists 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. Jonathan Edward Tammela billed Medicare for 189 services in 2024

CMS data shows 189 Medicare services from Dr. Tammela across 6 procedure codes in 2024, for 132 Medicare patients. Medicare paid $40,194 for them.

Medicare services, 2024189
Medicare patients132
Paid by Medicare$40,194
Procedure codes6

Dr. Tammela's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 1632024: 13915%
Surgery
2023: 612024: 5018%

Where Dr. Tammela's Medicare services took place, 2024

  • In an office13974%
  • In a facility5026%

Dr. Tammela compared with the California median for gynecologic oncologists, 2024

  • Dr. Tammela
  • California median
Medicare services
189vs 28032% below
Medicare patients
132vs 1228% above
Part D claims
12vs 3868% below

Medians across 165 gynecologic oncologists in California with Dmand AI profiles that report each measure.

Dr. Tammela'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. Tammela

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Jonathan Edward Tammela treated 132 Medicare patients in 2024, average age 73

CMS counts 132 Medicare patients who saw Dr. Tammela in 2024. The largest group is 65 to 74, with 70 patients. 70% of them have high cholesterol, and 60% have high blood pressure. 28% are also on Medicaid. Their average risk score is 1.00, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Tammela's median patient age at 63, with 99% women.

Medicare patients, 2024132
Average age73
Average risk score1.00
Also on Medicaid28%

Dr. Tammela's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Chronic conditions among Dr. Tammela's Medicare patients, 2024

  1. High cholesterol70%
  2. High blood pressure60%
  3. Cancer57%
  4. Arthritis50%
  5. Anxiety30%
  6. Diabetes22%
  7. Mood disorders22%
  8. Osteoporosis21%

Share of Medicare patients with each condition. A patient can have several.

Dr. Tammela's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 63

Patient panel by sex, all payers

  • Women99%
  • Men0%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Jonathan Edward Tammela wrote 12 Medicare Part D claims in 2022

In 2022, Dr. Tammela wrote 12 Medicare Part D claims. They cover 1 drug, with $68 in total drug cost. In 2021, CMS named 32 claims across 2 drugs.

Part D claims, 202212
Drugs named by CMS1
Total drug cost$68

Dr. Tammela's most prescribed drugs by claims, 2022

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, 2021 to 2022

  • 2021
  • 2022
Claims for drugs CMS names
2021: 322022: 1263%

Drugs named by CMS: 1 in 2022, 2 in 2021.

See all prescribing by Dr. Tammela

Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026

Dr. Jonathan Edward Tammela scored 100 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Tammela for performance year 2024, reported through an alternative payment model (APM). Dr. Tammela accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 42 procedures of removal of the uterus by Dr. Tammela, more than 98% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes

Dr. Tammela's MIPS scores, performance year 2024

  • 100of 100Final score
  • 86.3of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Where Dr. Tammela ranks in Medicare procedure volume

Removal of the uterus
98th percentile42 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)

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Dr. Jonathan Edward Tammela has 13 publications on record

Dmand AI links 13 papers to Dr. Tammela in 2004. The most frequent topics are Ovarian Neoplasms, Immunohistochemistry and Heat-Shock Proteins. Dr. Tammela has published most often in Gynecol Oncol. Dr. Tammela's most frequent co-authors are Yao-Tseng Chen, MD, Deborah A. Driscoll, MD and Adam K. Hiett, MD.

Papers13

Topics Dr. Tammela writes about most

  • Ovarian Neoplasms
  • Immunohistochemistry
  • Heat-Shock Proteins
  • Biomarkers, Tumor
  • RNA, Messenger
  • Adenocarcinoma, Clear Cell
  • Antibodies, Neoplasm
  • Antigens, Neoplasm

Dr. Tammela's most frequent co-authors

Recent publications by Dr. Tammela

See all 13 publications and co-authors

See who Dr. Tammela researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Tammela works with, so you can find a warm path to the right gynecologic oncologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Jonathan Edward Tammela has worked on 6 clinical trials

Dmand AI links Dr. Tammela to 6 clinical trials, 3 of them phase 3 studies. 2 are still active or recruiting. Conditions studied include Adenocarcinoma, Clear Cell, Brenner Tumor and Fallopian Tube Diseases. GOG Foundation sponsors the most, 3.

Clinical trials with Dr. Tammela by phase

  1. NonePhase 1: no trials
  2. 2Phase 2: 2 trials
  3. 1Phase 2/3: 1 trial
  4. 3Phase 3: 3 trials
  5. NonePhase 4: no trials

Conditions in Dr. Tammela's trials

  • Adenocarcinoma, Clear Cell
  • Brenner Tumor
  • Fallopian Tube Diseases
  • Uterine Cervical Neoplasms
  • Adenocarcinoma, Mucinous

Investigators on the most trials with Dr. Tammela

Recent clinical trials with Dr. Tammela

See all 6 clinical trials and co-investigators

Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Dr. Jonathan Edward Tammela received $1,882 in industry payments from 2016 to 2025

CMS Open Payments shows 21 general payments to Dr. Tammela from 7 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Intuitive Surgical, Inc. paid the most, $947.

General payments to Dr. Tammela by program year, 2016 to 2025

Companies that paid Dr. Tammela the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Tammela

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Jonathan Edward Tammela graduated from Indiana University School Of Medicine

Dr. Tammela graduated from Indiana University School Of Medicine in 1998.

  1. Medical schoolIndiana University School Of Medicine
  2. Board certified in gynecologic oncologyAmerican Board of Obstetrics and Gynecology
  3. Board certified in obstetrics & gynecologyAmerican Board of Obstetrics and Gynecology

Source: Dmand AI Professional Profile Data

Dr. Jonathan Edward Tammela accepts plans from 13 insurance carriers

Dr. Tammela is in network with 13 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

  • Aetna
  • Elevance
  • Excellus BlueCross BlueShield
  • Blue Cross Blue Shield of Michigan
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • Regence Health Plans
  • United Healthcare
  • +5 more carriersWith a free account

Plan types Dr. Tammela accepts, by number of carriers

  1. Medicare8
  2. PPO8
  3. POS6
  4. HMO5
  5. EPO4
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Jonathan Edward Tammela'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 phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy 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)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
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. Jonathan Edward Tammela

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. Jonathan Edward Tammela's NPI number?

Dr. Jonathan Edward Tammela's NPI number is 1265451058. It was assigned on July 19, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Jonathan Edward Tammela?

Dr. Jonathan Edward Tammela is a gynecologic oncologist in Santa Maria, California. The primary specialty in the NPI Registry is Gynecologic Oncology Physician (taxonomy code 207VX0201X).

Where does Dr. Jonathan Edward Tammela practice?

Dr. Tammela practices at 1400 E Church St, Santa Maria, CA 93454. Dr. Tammela's primary practice is Dignity Health - Marian Regional Medical Center in Santa Maria, California, part of CommonSpirit Health. Dmand AI also links Dr. Tammela to 1 hospital, 1 group practice or clinic and 1 medical group.

What is Dr. Jonathan Edward Tammela's office phone number?

The practice phone on file for Dr. Tammela is (805) 739-3100.

What is Dr. Jonathan Edward Tammela's medical license number?

Dr. Tammela's Wisconsin license number on file is 48350, one of the licenses on file in 4 states.

Which states has Dr. Jonathan Edward Tammela been licensed in?

Dmand AI has state licenses on file for Dr. Tammela in Wisconsin (2005 to 2019), California (2018 to 2027), Florida (1999 to 2007) and New York (2002 to 2007).

Which hospitals is Dr. Jonathan Edward Tammela affiliated with?

Dr. Tammela practices at Dignity Health - Marian Regional Medical Center in Santa Maria, California. Dr. Tammela is also affiliated with Dignity Health - French Hospital Medical Center. Dmand AI links Dr. Tammela to 1 more hospital.

What medical group is Dr. Jonathan Edward Tammela part of?

Dr. Tammela is linked to Pacific Central Coast Health Centers Medical Group. Dmand AI links Dr. Tammela to 1 more medical group.

Does Dr. Jonathan Edward Tammela accept Medicare?

Yes. CMS data shows Dr. Tammela billed Medicare for 189 services in 2024, and Dr. Tammela accepts Medicare assignment.

What is Dr. Jonathan Edward Tammela's MIPS score?

Dr. Tammela's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).

Show 10 more questionsShow fewer questions

How many Medicare patients does Dr. Jonathan Edward Tammela see?

CMS counts 132 Medicare patients who saw Dr. Tammela in 2024, with an average age of 73.

Is Dr. Jonathan Edward Tammela board certified?

Yes. Dr. Tammela is board certified in gynecologic oncology by the American Board of Obstetrics and Gynecology.

What services does Dr. Jonathan Edward Tammela bill to Medicare?

In 2024, Dr. Tammela's most billed Medicare services were office visit, established patient (99213), office visit, new patient (99205) and office visit, new patient (99204).

Where did Dr. Jonathan Edward Tammela go to medical school?

Dr. Tammela graduated from Indiana University School Of Medicine in 1998.

What drugs does Dr. Jonathan Edward Tammela prescribe most?

In 2022 Medicare Part D data, Dr. Tammela's most prescribed drugs by claims were Oxycodone-Acetaminophen.

Has Dr. Jonathan Edward Tammela received payments from drug or device companies?

CMS Open Payments shows $1,882 in general payments to Dr. Tammela from 7 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.

How long has Dr. Jonathan Edward Tammela been practicing?

Dr. Tammela graduated from medical school in 1998, 28 years ago.

Does Dr. Jonathan Edward Tammela do research?

Dmand AI links 13 publications to Dr. Tammela. Dr. Tammela has worked on 6 clinical trials.

Who does Dr. Jonathan Edward Tammela publish with?

Dr. Tammela's most frequent co-authors are Yao-Tseng Chen, MD (1 shared paper), Deborah A. Driscoll, MD (1 shared paper) and Adam K. Hiett, MD (1 shared paper).

What insurance does Dr. Jonathan Edward Tammela accept?

Dr. Tammela is in network with 13 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

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