Mark A. Bookspan
Internal Medicine Physician · Santa Barbara, CA
Mark A. Bookspan is an internal medicine physician with a practice address in Santa Barbara, California, and NPI 1104908292, issued on Oct 19, 2006. Check the license (California G36429, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark A. Bookspan
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G36429 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 W Pueblo St RM 3635, Santa Barbara, CA 93105
- Phone
- (805) 682-3610
- Enumerated
- Oct 19, 2006
- Record last updated
- Aug 13, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (805) 682-3050
- Medicare enrollment
- Enrolled (PECOS I20140923002674); accepts Medicare assignment
- Medical or professional school
- Medical College Of Ohio, 1972
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 400 W Pueblo St RM 3635
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Thaddeus Bordofsky, M.D.Internal Medicine Physician1760542583
- Lynn Fitzgibbons, M.D.Infectious Disease Physician1285868539
Verify Mark A. Bookspan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G36429Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
176 Medicare Part D claims for 19 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 67% of claims.
Most prescribed
- Benlysta25 claims
- Humira Pen18 claims
- Xeljanz18 claims
- Enbrel Sureclick12 claims
- Kevzara12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Cottage Medical AssociatesSanta Barbara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark A. Bookspan among 17,696 internal medicine physician records in California
Mark A. Bookspan is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1972 · median 2004 among the 11,065 with a school on file
- Record last updated2018 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
129 internal medicine physician records list a practice address in Santa Barbara
They are 129 of the 5,328 NPPES records with a practice address in Santa Barbara, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Santa Barbara → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Dennis Baker, M.DSanta Barbara, CA 931051669419602
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- Laurel Bliss, MDSanta Barbara, CA 931051154368868
- David Dodson, M.DSanta Barbara, CA 931051619943834
- Patrick Frawley, MDSanta Barbara, CA 931051093707358
- Jeffrey Hadsall, M.D.Santa Barbara, CA 931051275641714
- William Koonce, MDSanta Barbara, CA 931051124010095
- Sandra Kramer, MDSanta Barbara, CA 931051104823418
Common questions
What is Mark A. Bookspan's NPI number?
Mark A. Bookspan's National Provider Identifier (NPI) is 1104908292, issued on Oct 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Bookspan located?
The NPPES record lists a practice address at 400 W Pueblo St RM 3635, Santa Barbara, CA, 93105. Phone: (805) 682-3610. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Bookspan's license?
NPPES lists California license number G36429, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark A. Bookspan prescribe under Medicare Part D?
In 2024, Mark A. Bookspan had 176 Medicare Part D claims for 19 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.