Felix Santiago Guerra Castanon, MD
Neurology Physician · Birmingham, AL
Felix Santiago Guerra Castanon, MD is a neurology physician with a practice address in Birmingham, Alabama, and NPI 1639690480, issued on Jul 2, 2017. Check the license (Alabama 42495, as entered in NPPES) on the Alabama Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Felix Santiago Guerra Castanon
- Credential
- MD
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- 42495 AL
Self-reported in NPPES; status is on the state search - Practice location
- 619 19TH St S, Birmingham, AL 35249
- Phone
- (205) 934-4011
- Enumerated
- Jul 2, 2017
- Record last updated
- Feb 6, 2024
- Medicare enrollment
- Enrolled (PECOS I20230707000058); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 259 in Alabama → Look up another NPI →
Also registered at 619 19TH St S
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Felix Santiago Guerra Castanon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersAlabama Board of Medical Examiners
Search for license 42495Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average neurology physician in 2024
160 Medicare Part D claims for 44 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Atorvastatin Calcium37 claims
- Rosuvastatin Calcium27 claims
- Ezetimibe15 claims
- Eliquis13 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
- University OF Alabama Health Services Foundation, PCBirmingham, AL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Felix Santiago Guerra Castanon among 259 neurology physician records in Alabama
Felix Santiago Guerra Castanon, MD is one of 259 neurology physician records with a practice address in Alabama. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 80% of them.
- NPI issued2017 · 80% of these records are older, 18% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2014 · median 2004 among the 189 with a school on file
- Record last updated2024 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a Alabama practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in Alabama
There are 259 neurology physician records in Alabama.
All 259 in Alabama → Every provider in Birmingham → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Mohammad Aladawi, MDBirmingham, AL 352491760094593
- Leslie Grayson, M.D.Birmingham, AL 352491689964512
- Toby Gropen, MDBirmingham, AL 352491396707832
- Harshad Ladha, M.D.Birmingham, AL 352491396127973
- Scott Marshall, M.D.Birmingham, AL 352491659357093
- Christina Mills, MDBirmingham, AL 352491548723760
- Rebeka Sipma, MDBirmingham, AL 352491215434303
- Aparna Vaddiparti, M.D.Birmingham, AL 352491700268208
Common questions
What is Felix Santiago Guerra Castanon, MD's NPI number?
Felix Santiago Guerra Castanon, MD's National Provider Identifier (NPI) is 1639690480, issued on Jul 2, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Felix Santiago Guerra Castanon, MD located?
The NPPES record lists a practice address at 619 19TH St S, Birmingham, AL, 35249. Phone: (205) 934-4011. Providers update this record themselves, so call before visiting.
How can I verify Felix Santiago Guerra Castanon, MD's license?
NPPES lists Alabama license number 42495, as entered by the provider. Search the Alabama Board of Medical Examiners at https://www.albme.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Felix Santiago Guerra Castanon, MD prescribe under Medicare Part D?
In 2024, Felix Santiago Guerra Castanon, MD had 160 Medicare Part D claims for 44 beneficiaries; the average among neurology physician prescribers was 1,370. 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.