Physician Profile
Unclaimed ProfileAbout MACK
William Jacob Mack, M.D. practices neurosurgery in Los Angeles, CA. William is a 2001 graduate of Columbia University College of Physicians and Surgeons. William is also listed as specializing in neurological surgery. Medicare claims data shows William provided 160 services to 151 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (323) 442-5720
- Email not available
Practice Locations
1520 SAN PABLO ST STE 3800
Los Angeles, CA 90033
Procedures Most Often Billed to Medicare
160 services · 151 patients · 10 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist | Procedure | 36224 |
22 |
| Insertion of tube into external neck artery for diagnosis or treatment with review by radiologist | Procedure | 36227 |
17 |
| Insertion of tube into brain artery for diagnosis or treatment with review by radiologist | Procedure | 36226 |
15 |
| Occlusion of central nervous system or spinal cord artery | Procedure | 61624 |
13 |
| Insertion of tube into intracranial artery for diagnosis or treatment with review by radiologist | Procedure | 36223 |
11 |
| Imaging of blood vessel | Imaging | 75898 |
22 |
| Review by radiologist of image for insertion of material to block blood flow | Imaging | 75894 |
14 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
20 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
15 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
11 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other neurosurgery specialists in Los Angeles 8
Same specialty, same city.
Trained at Columbia University College of Physicians and Surgeons 7
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 2001 at Columbia University College of Physicians and Surgeons 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Mack specialize in?
Dr. Mack is a neurosurgery in Los Angeles, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “NEUROSURGERY”.
NPI registry
Where is Dr. Mack located?
Dr. Mack is listed at 1520 SAN PABLO ST STE 3800, Los Angeles, CA 90033. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Mack's phone number?
The number on file is (323) 442-5720. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Mack?
Dr. Mack's National Provider Identifier is 1811163793. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Mack go to medical school?
Dr. Mack attended Columbia University College of Physicians and Surgeons, graduating in 2001. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Mack have?
Dr. Mack has 25 years experience. Calculated from a graduation year of 2001, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Mack do most often?
According to Medicare billing data, Dr. Mack performs procedures including insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist, insertion of tube into external neck artery for diagnosis or treatment with review by radiologist and insertion of tube into brain artery for diagnosis or treatment with review by radiologist; reads or performs imaging such as imaging of blood vessel and review by radiologist of image for insertion of material to block blood flow, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Mack's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Mack. If this is you, claiming it is free.
Guide.md
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.