Dr. Michael L. Deftos, MD, PhD

  • San Jose, CA
  • Pathologist
NPI1346557139PAC ID3375711955
Medicare services, 2024
374
Medicare patients, 2024
166
Publications
8
MIPS score, 2024
61
Hospital affiliations
1
Practice address
751 South Bascom Avenue, San Jose, CA 95128
Practice phone
Call (408) 885-5000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Santa Clara Valley Medical Center

Hospital · San Jose, California

See all 3 affiliations

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Dr. Michael L. Deftos is a pathologist in San Jose, California

Dr. Deftos practices at Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA.

Dr. Deftos' NPI, 1346557139, was assigned on September 1, 2010. Dr. Deftos graduated from University Of Washington School Of Medicine in 2003. Dr. Deftos holds California license A98387.

NPI and contact details
Medicare PAC ID
3375711955
NPI enumeration date
September 1, 2010
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(408) 885-5000
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
49
Medical school graduation
2003

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

Dr. Michael L. Deftos practices at Santa Clara Valley Medical Center in San Jose, California

Dr. Deftos' primary practice is Santa Clara Valley Medical Center, at 751 South Bascom Avenue, San Jose, CA 95128 in Santa Clara County. The practice phone is (408) 885-5000.

Source: Dmand AI Affiliation Data

Dr. Michael L. Deftos is affiliated with 2 sites of care and 1 medical group

Dr. Deftos' primary practice is Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA. The medical group on file is County of Santa Clara Behavioral Health Services, Las Plumas Behavioral Health Clinic. Dmand AI also links Dr. Deftos to 1 more community health center, named with a free account.

See all 3 affiliations for Dr. Deftos

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

Dmand AI tracks the EHR system at Dr. Michael L. Deftos' practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Deftos practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Santa Clara Valley Medical CenterAvailable with a free account
+1 more affiliated siteAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dr. Michael L. Deftos is one of 1,354 pathologists in California

Anatomic pathology and clinical pathology is Dr. Deftos' primary specialty in the NPI Registry, under taxonomy code 207ZP0102X. Dr. Deftos is board certified in hematopathology by the American Board of Pathology. Dr. Deftos is licensed in California.

Specialties and state licenses

  • Anatomic pathology and clinical pathology, CaliforniaPrimaryLicense A98387 · 2006 to 2026 · taxonomy 207ZP0102X

Pathologists near Dr. Deftos

Counts of pathologists 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. Michael L. Deftos billed Medicare for 374 services in 2024

CMS data shows 374 Medicare services from Dr. Deftos across 9 procedure codes in 2024, for 166 Medicare patients. Medicare paid $12,891 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024374
Medicare patients166
Paid by Medicare$12,891
Procedure codes9

Dr. Deftos' Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Lab and pathology
2023: 5182024: 37428%

Dr. Deftos compared with the California median for pathologists, 2024

  • Dr. Deftos
  • California median
Medicare services
374vs 1,15368% below
Medicare patients
166vs 44763% below

Medians across 1,094 pathologists in California with Dmand AI profiles that report each measure.

Dr. Deftos' 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. Deftos

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

Dr. Michael L. Deftos treated 166 Medicare patients in 2024, average age 70

CMS counts 166 Medicare patients who saw Dr. Deftos in 2024. The largest group is 65 to 74, with 88 patients. 75% of them have high blood pressure, and 59% have high cholesterol. 80% are also on Medicaid. Their average risk score is 2.02, 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. Deftos' median patient age at 63, with 54% women.

Medicare patients, 2024166
Average age70
Average risk score2.02
Also on Medicaid80%

Dr. Deftos' Medicare patients by age, 2024

Dr. Deftos' Medicare patients by sex, 2024

  • Women9457%
  • Men7243%

Chronic conditions among Dr. Deftos' Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol59%
  3. Diabetes42%
  4. Chronic kidney disease30%
  5. Cancer29%
  6. Arthritis27%
  7. Mood disorders27%
  8. Heart failure24%

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

Dr. Deftos' 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

  • Women54%
  • Men46%

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

Dr. Michael L. Deftos scored 61 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 61 out of 100 for Dr. Deftos for performance year 2024, reported as part of a group. Dr. Deftos accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Dr. Deftos' MIPS scores, performance year 2024

  • 61of 100Final score
  • 59.4of 100Quality
  • 0of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 71of 100Cost

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

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

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Dr. Michael L. Deftos has 8 publications on record

Dmand AI links 8 papers to Dr. Deftos, published from 2012 to 2023. The most frequent topics are Proteins, Signal Transduction and In Situ Hybridization. Dr. Deftos' most frequent co-authors are Harminder Singh, Michael H. Zhang, MD and Michael Zhang.

Papers8
Years published2012 to 2023

Dr. Deftos' papers by year, 2012 to 2023

Topics Dr. Deftos writes about most

  • Proteins
  • Signal Transduction
  • In Situ Hybridization
  • Intracellular Signaling Peptides and Proteins
  • Membrane Proteins
  • Mesoderm
  • Receptor, Notch1
  • Receptors, Cell Surface

Dr. Deftos' most frequent co-authors

Recent publications by Dr. Deftos

See all 8 publications and co-authors

See who Dr. Deftos researches with

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

How network discovery works

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

Dr. Michael L. Deftos graduated from University Of Washington School Of Medicine

Dr. Deftos graduated from University Of Washington School Of Medicine in 2003.

  1. Medical schoolUniversity Of Washington School Of Medicine
  2. Board certified in hematopathologyAmerican Board of Pathology
  3. Board certified in pathology - anatomicAmerican Board of Pathology
  4. Board certified in pathology - clinicalAmerican Board of Pathology

Source: Dmand AI Professional Profile Data

Dr. Michael L. Deftos accepts plans from 2 insurance carriers

Dr. Deftos is in network with 2 carriers, including Aetna and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.

  • Aetna
  • CMS Medicare

Plan types Dr. Deftos accepts, by number of carriers

  1. EPO1
  2. HMO1
  3. Medicare1
  4. POS1
  5. PPO1

Source: Dmand AI Insurance Network Data

Sources for Dr. Michael L. Deftos'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)
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)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
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. Michael L. Deftos

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. Michael L. Deftos' NPI number?

Dr. Michael L. Deftos' NPI number is 1346557139. It was assigned on September 1, 2010, and it is active in the NPI Registry.

What kind of doctor is Dr. Michael L. Deftos?

Dr. Michael L. Deftos is a pathologist in San Jose, California. The primary specialty in the NPI Registry is Anatomic Pathology & Clinical Pathology Physician (taxonomy code 207ZP0102X).

Where does Dr. Michael L. Deftos practice?

Dr. Deftos practices at 751 South Bascom Avenue, San Jose, CA 95128. Dr. Deftos' primary practice is Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA. Dmand AI also links Dr. Deftos to 1 community health center.

What is Dr. Michael L. Deftos' office phone number?

The practice phone on file for Dr. Deftos is (408) 885-5000.

What is Dr. Michael L. Deftos' medical license number?

Dr. Deftos holds California license A98387.

Which hospitals is Dr. Michael L. Deftos affiliated with?

Dr. Deftos practices at Santa Clara Valley Medical Center in San Jose, California.

What medical group is Dr. Michael L. Deftos part of?

Dr. Deftos is linked to County of Santa Clara Behavioral Health Services, Las Plumas Behavioral Health Clinic.

Does Dr. Michael L. Deftos accept Medicare?

Yes. CMS data shows Dr. Deftos billed Medicare for 374 services in 2024, and Dr. Deftos accepts Medicare assignment.

What is Dr. Michael L. Deftos' MIPS score?

Dr. Deftos' MIPS final score for performance year 2024 is 61 out of 100, reported as part of a group.

How many Medicare patients does Dr. Michael L. Deftos see?

CMS counts 166 Medicare patients who saw Dr. Deftos in 2024, with an average age of 70.

Show 7 more questionsShow fewer questions

Is Dr. Michael L. Deftos board certified?

Yes. Dr. Deftos is board certified in hematopathology by the American Board of Pathology.

What services does Dr. Michael L. Deftos bill to Medicare?

In 2024, Dr. Deftos' most billed Medicare services were lab and pathology test (88305), lab and pathology test (88341) and lab and pathology test (88342).

Where did Dr. Michael L. Deftos go to medical school?

Dr. Deftos graduated from University Of Washington School Of Medicine in 2003.

How long has Dr. Michael L. Deftos been practicing?

Dr. Deftos graduated from medical school in 2003, 23 years ago.

Does Dr. Michael L. Deftos do research?

Dmand AI links 8 publications to Dr. Deftos, published from 2012 to 2023.

Who does Dr. Michael L. Deftos publish with?

Dr. Deftos' most frequent co-authors are Harminder Singh (2 shared papers), Michael H. Zhang, MD (2 shared papers) and Michael Zhang (2 shared papers).

What insurance does Dr. Michael L. Deftos accept?

Dr. Deftos is in network with 2 carriers, including Aetna and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.

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