Dr. William Blaschko, MD
- Medicare services, 2021
- 50
- Part D claims, 2020
- 13
- Industry payments
- $121
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 400 Parnassus Ave, San Francisco, CA 94143-2202
- Practice phone
- Call (760) 674-3847
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Blaschko'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. William Blaschko is a family medicine physician in San Francisco, California
Dr. Blaschko practices in San Francisco, California.
Dr. Blaschko's NPI, 1891709689, was assigned on July 28, 2006. Dr. Blaschko graduated from UC San Diego School of Medicine in 1979. Dr. Blaschko's California license number on file is G42865.
- NPI
- 1891709689NPI Registry (opens in a new tab)
- NPI enumeration date
- July 28, 2006
- NPI status
- Active
- Practice phone
- (760) 674-3847
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. William Blaschko's practice address is in San Francisco, California
Dr. Blaschko's practice address in the NPI Registry is 400 Parnassus Ave, San Francisco, CA 94143-2202. The practice phone is (760) 674-3847.
- NPI Registry address400 Parnassus Ave, San Francisco, CA 94143-2202Phone(760) 674-3847
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. William Blaschko's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Blaschko practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Blaschko's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Blaschko is one of 15,680 family medicine physicians in California
Family medicine is Dr. Blaschko's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Blaschko is board certified in emergency medicine by the American Board of Emergency Medicine. Dr. Blaschko has a license on file in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Family medicine physicians near Dr. Blaschko
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 Blaschko billed Medicare for 50 services in 2021
CMS data shows 50 Medicare services from Dr. Blaschko across 3 procedure codes in 2021, all of them office visits. Medicare paid $3,010 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Blaschko's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 1362021: 5063%
Dr. Blaschko compared with the California median for family medicine physicians, 2021
- Dr. Blaschko
- California median
- Medicare services
- 50vs 24680% below
- Part D claims
- 13vs 83398% below
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Blaschko's most billed Medicare procedure codes, 2021
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. Blaschko 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 Blaschko wrote 13 Medicare Part D claims in 2020
In 2020, Dr. Blaschko wrote 13 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $42 in total drug cost. In 2018, CMS named 16 claims across 1 drug.
Dr. Blaschko'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, 2018 to 2020
- 2018
- 2020
- Claims for drugs CMS names
- 2018: 162020: 1319%
Drugs named by CMS: 1 in 2020, 1 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. William Blaschko received $121 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Blaschko from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. DePuy Synthes Sales Inc. paid the most, $121.
Companies that paid Dr. Blaschko the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Blaschko graduated from UC San Diego School of Medicine
Dr. Blaschko graduated from UC San Diego School of Medicine in 1979.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. William Blaschko'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice 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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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 |
| 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 Blaschko
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 Blaschko's NPI number?
Dr. William Blaschko's NPI number is 1891709689. It was assigned on July 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William Blaschko?
Dr. William Blaschko is a family medicine physician in San Francisco, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. William Blaschko practice?
Dr. Blaschko practices at 400 Parnassus Ave, San Francisco, CA 94143-2202.
What is Dr. William Blaschko's office phone number?
The practice phone on file for Dr. Blaschko is (760) 674-3847.
What is Dr. William Blaschko's medical license number?
Dr. Blaschko's California license number on file is G42865.
Does Dr. William Blaschko accept Medicare?
Yes. CMS data shows Dr. Blaschko billed Medicare for 50 services in 2021.
Is Dr. William Blaschko board certified?
Yes. Dr. Blaschko is board certified in emergency medicine by the American Board of Emergency Medicine.
What services does Dr. William Blaschko bill to Medicare?
In 2021, Dr. Blaschko's most billed Medicare services were office visit, new patient (99203), office visit, established patient (99213) and office visit, established patient (99214).
Where did Dr. William Blaschko go to medical school?
Dr. Blaschko graduated from UC San Diego School of Medicine in 1979.
What drugs does Dr. William Blaschko prescribe most?
In 2020 Medicare Part D data, Dr. Blaschko's most prescribed drugs by claims were Prednisone.
Has Dr. William Blaschko received payments from drug or device companies?
CMS Open Payments shows $121 in general payments to Dr. Blaschko from 1 company from 2016 to 2016. The largest total came from DePuy Synthes Sales Inc.
How long has Dr. William Blaschko been practicing?
Dr. Blaschko graduated from medical school in 1979, 47 years ago.
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