Dr. Michael Kessler, MD
- Medicare services, 2022
- 317
- Hospital affiliations
- 2
- Industry payments
- $196
- Medical groups
- 3
- State licenses
- 2
- Practice address
- 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598
- Practice phone
- Call (925) 939-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Kessler's 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. Michael Kessler is an emergency medicine physician in Walnut Creek, California
Dr. Kessler practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health.
Dr. Kessler's NPI, 1316995830, was assigned on May 5, 2006. Dr. Kessler graduated from Saint Louis University School Of Medicine in 1971. Dr. Kessler holds California license C34771.
- NPI
- 1316995830NPI Registry (opens in a new tab)
- NPI enumeration date
- May 5, 2006
- NPI status
- Active
- Practice phone
- (925) 939-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 81
- Medical school graduation
- 1971
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Kessler practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California
Dr. Kessler's primary practice is John Muir Medical Center, Walnut Creek, at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 in Contra Costa County. The practice phone is (925) 939-3000.
- John Muir Medical Center, Walnut Creek1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 · Contra Costa CountyPhone(925) 939-3000
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Kessler is affiliated with 2 sites of care and 3 medical groups
Dr. Kessler's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. Dr. Kessler is also affiliated with Alta Bates Summit Medical Center | Alta Bates Campus. The medical group on file is Vituity. Dmand AI also links Dr. Kessler to 2 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael Kessler's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kessler practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| John Muir Medical Center, Walnut Creek | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across John Muir Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Michael Kessler is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Kessler's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Kessler's licenses on file in 2 states: California and Florida.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
- Florida license
Emergency medicine physicians near Dr. Kessler
Counts of emergency medicine physicians 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 Kessler billed Medicare for 317 services in 2022
CMS data shows 317 Medicare services from Dr. Kessler across 2 procedure codes in 2022. Medicare paid $28,505 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Kessler's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Tests and treatments
- 2021: 2732022: 2875%
- Office and hospital visits
- 2021: 282022: 307%
Dr. Kessler compared with the California median for emergency medicine physicians, 2022
- Dr. Kessler
- California median
- Medicare services
- 317vs 26520% above
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Kessler's most billed Medicare procedure codes, 2022
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. Kessler?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kessler and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Kessler's patients have a median age of 84
Across all payers, Dmand AI patient panel data puts Dr. Kessler's median patient age at 84, with 100% women.
Dr. Kessler's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 84
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
For MedTech and pharma teams
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Dr. Michael Kessler received $196 in industry payments from 2016 to 2018
CMS Open Payments shows 3 general payments to Dr. Kessler from 2 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. Zimmer Biomet Holdings, Inc. paid the most, $121.
General payments to Dr. Kessler by program year, 2016 to 2018
Companies that paid Dr. Kessler the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael Kessler graduated from Saint Louis University School Of Medicine
Dr. Kessler graduated from Saint Louis University School Of Medicine in 1971.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael Kessler'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand 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 Data |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Michael Kessler
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 Kessler's NPI number?
Dr. Michael Kessler's NPI number is 1316995830. It was assigned on May 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Kessler?
Dr. Michael Kessler is an emergency medicine physician in Walnut Creek, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Michael Kessler practice?
Dr. Kessler practices at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598. Dr. Kessler's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. Dmand AI also links Dr. Kessler to 2 medical groups.
What is Dr. Michael Kessler's office phone number?
The practice phone on file for Dr. Kessler is (925) 939-3000.
What is Dr. Michael Kessler's medical license number?
Dr. Kessler holds California license C34771, one of the licenses on file in 2 states.
Which states has Dr. Michael Kessler been licensed in?
Dmand AI has state licenses on file for Dr. Kessler in California (1987 to 2027) and Florida (1978 to 1998).
Which hospitals is Dr. Michael Kessler affiliated with?
Dr. Kessler practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California. Dr. Kessler is also affiliated with Alta Bates Summit Medical Center | Alta Bates Campus.
What medical group is Dr. Michael Kessler part of?
Dr. Kessler is linked to Vituity. Dmand AI links Dr. Kessler to 2 more medical groups.
Does Dr. Michael Kessler accept Medicare?
Yes. CMS data shows Dr. Kessler billed Medicare for 317 services in 2022.
What services does Dr. Michael Kessler bill to Medicare?
In 2022, Dr. Kessler's most billed Medicare services were special service (99183) and office visit, established patient (99213).
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Where did Dr. Michael Kessler go to medical school?
Dr. Kessler graduated from Saint Louis University School Of Medicine in 1971.
Has Dr. Michael Kessler received payments from drug or device companies?
CMS Open Payments shows $196 in general payments to Dr. Kessler from 2 companies from 2016 to 2018. The largest total came from Zimmer Biomet Holdings, Inc.
How long has Dr. Michael Kessler been practicing?
Dr. Kessler graduated from medical school in 1971, 55 years ago.
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