Dr. William A. Klas, MD
- Medicare services, 2022
- 440
- Medicare patients, 2024
- 13
- Part D claims, 2024
- 1,659
- Industry payments
- $3,090
- Affiliated sites
- 1
- Practice address
- 4212 Missouri Flat Road, Placerville, CA 95667
- Practice phone
- Call (530) 621-7702
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
El Dorado Community Health Center - Placerville
FQHC - Main Site · Placerville, California
Find Dr. Klas' 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. William A. Klas is a family medicine physician in Placerville, California
Dr. Klas practices at El Dorado Community Health Center - Placerville in Placerville, California.
Dr. Klas' NPI, 1427059971, was assigned on August 9, 2005. Dr. Klas graduated from UC San Diego School of Medicine in 1986. Dr. Klas holds California license G65747.
- NPI
- 1427059971NPI Registry (opens in a new tab)
- NPI enumeration date
- August 9, 2005
- NPI status
- Active
- Practice phone
- (530) 621-7702
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William A. Klas practices at El Dorado Community Health Center - Placerville in Placerville, California
Dr. Klas' primary practice is El Dorado Community Health Center - Placerville, at 4212 Missouri Flat Road, Placerville, CA 95667 in El Dorado County. The practice phone is (530) 621-7702.
- El Dorado Community Health Center - Placerville4212 Missouri Flat Road, Placerville, CA 95667 · El Dorado CountyPhone(530) 621-7702
Source: Dmand AI Affiliation Data
Dr. William A. Klas is affiliated with 1 site of care
Dr. Klas' primary practice is El Dorado Community Health Center - Placerville in Placerville, California. Dr. Klas' employer is on file too: a community health center (fqhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William A. Klas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Klas practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| El Dorado Community Health Center - Placerville | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William A. Klas is one of 15,680 family medicine physicians in California
Family medicine is Dr. Klas' primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Klas is board certified in family medicine by the American Board of Family Medicine. Dmand AI has Dr. Klas' licenses on file in 2 states: California and Idaho.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
- Idaho license
Clinical focus
Dmand AI lists acute gastroduodenitis, acute mini-stroke (TIA), acute sinusitis, acute skin infection, adjustment disease, anxiety, arthritis and asthma among the conditions Dr. Klas treats.
Family medicine physicians near Dr. Klas
Counts of family 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. William A. Klas billed Medicare for 440 services in 2022
CMS data shows 440 Medicare services from Dr. Klas across 5 procedure codes in 2022, for 13 Medicare patients. Medicare paid $18,956 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Klas' Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 7982022: 42946%
- Other services
- 2021: 132022: 1115%
Dr. Klas compared with the California median for family medicine physicians, 2022
- Dr. Klas
- California median
- Medicare services
- 440vs 24679% above
- Medicare patients
- 13vs 11889% below
- Part D claims
- 1,126vs 83335% above
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Klas' 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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Klas and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William A. Klas treated 13 Medicare patients in 2024, average age 67
CMS counts 13 Medicare patients who saw Dr. Klas in 2024. Their average risk score is 1.01, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Klas' median patient age at 49, with 57% women.
Dr. Klas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 49
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William A. Klas wrote 1,659 Medicare Part D claims in 2024
In 2024, Dr. Klas wrote 1,659 Medicare Part D claims for 335 patients. 89% of them were for generic drugs. CMS names the drug for 1,126 of them, across 41 drugs with 11 or more claims each, at $50,212 in total drug cost. In 2023, CMS named 473 claims across 22 drugs.
Dr. Klas' Part D claims by kind of drug, 2024
- Generic1,476 claims89%
- Brand-name and other183 claims11%
Dr. Klas' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Klas' Part D claims, 2024
- Opioids9%147 of 1,659 claims
- Antibiotics2%29 of 1,659 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4732024: 1,126138%
Drugs named by CMS: 41 in 2024, 22 in 2023.
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. William A. Klas received $3,090 in industry payments from 2016 to 2023
CMS Open Payments shows 196 general payments to Dr. Klas from 30 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $355.
General payments to Dr. Klas by program year, 2016 to 2023
Companies that paid Dr. Klas the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William A. Klas graduated from UC San Diego School of Medicine
Dr. Klas graduated from UC San Diego School of Medicine in 1986.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. William A. Klas accepts plans from 7 insurance carriers
Dr. Klas is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Elevance
- NV State Medicaid
Plan types Dr. Klas accepts, by number of carriers
- PPO6
- Medicare5
- HMO2
- POS2
- EPO1
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. William A. Klas'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) |
| 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. William A. Klas
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. William A. Klas' NPI number?
Dr. William A. Klas' NPI number is 1427059971. It was assigned on August 9, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. William A. Klas?
Dr. William A. Klas is a family medicine physician in Placerville, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. William A. Klas practice?
Dr. Klas practices at 4212 Missouri Flat Road, Placerville, CA 95667. Dr. Klas' primary practice is El Dorado Community Health Center - Placerville in Placerville, California.
What is Dr. William A. Klas' office phone number?
The practice phone on file for Dr. Klas is (530) 621-7702.
What is Dr. William A. Klas' medical license number?
Dr. Klas holds California license G65747, one of the licenses on file in 2 states.
Which states has Dr. William A. Klas been licensed in?
Dmand AI has state licenses on file for Dr. Klas in California (1989 to 2026) and Idaho (1987 to 2016).
Does Dr. William A. Klas accept Medicare?
Yes. CMS data shows Dr. Klas billed Medicare for 440 services in 2022.
How many Medicare patients does Dr. William A. Klas see?
CMS counts 13 Medicare patients who saw Dr. Klas in 2024, with an average age of 67.
Is Dr. William A. Klas board certified?
Yes. Dr. Klas is board certified in family medicine by the American Board of Family Medicine.
What services does Dr. William A. Klas bill to Medicare?
In 2022, Dr. Klas' most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and office visit, established patient (99212).
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Where did Dr. William A. Klas go to medical school?
Dr. Klas graduated from UC San Diego School of Medicine in 1986.
What drugs does Dr. William A. Klas prescribe most?
In 2024 Medicare Part D data, Dr. Klas' most prescribed drugs by claims were Hydrocodone-Acetaminophen, Atorvastatin Calcium and Lisinopril.
Has Dr. William A. Klas received payments from drug or device companies?
CMS Open Payments shows $3,090 in general payments to Dr. Klas from 30 companies from 2016 to 2023. The largest total came from Amgen Inc.
How long has Dr. William A. Klas been practicing?
Dr. Klas graduated from medical school in 1986, 40 years ago.
What insurance does Dr. William A. Klas accept?
Dr. Klas is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 6. Check the plan with the practice before a visit.
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