Dr. William S. Baek, MD
- Part D claims, 2024
- 3,167
- Publications
- 13
- Hospital affiliations
- 1
- Industry payments
- $66,561
- Medical groups
- 2
- Practice address
- 1798 N Garey Ave, Pomona, CA 91767
- Practice phone
- Call (909) 865-9500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Baek'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 S. Baek is a neurologist in Pomona, California
Dr. Baek practices at Pomona Valley Hospital Medical Center in Pomona, California, part of Pomona Valley Hospital Medical Center.
Dr. Baek's NPI, 1326095977, was assigned on May 28, 2006. Dr. Baek graduated from Seoul National University College of Medicine in 1999. Dr. Baek holds California license A91283.
- NPI
- 1326095977NPI Registry (opens in a new tab)
- NPI enumeration date
- May 28, 2006
- NPI status
- Active
- Practice phone
- (909) 865-9500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William S. Baek practices at Pomona Valley Hospital Medical Center in Pomona, California
Dr. Baek's primary practice is Pomona Valley Hospital Medical Center, at 1798 N Garey Ave, Pomona, CA 91767 in Los Angeles County. The practice phone is (909) 865-9500.
- Pomona Valley Hospital Medical Center1798 N Garey Ave, Pomona, CA 91767 · Los Angeles CountyPhone(909) 865-9500
Source: Dmand AI Affiliation Data
Dr. William S. Baek is affiliated with 3 sites of care and 2 medical groups
Dr. Baek's primary practice is Pomona Valley Hospital Medical Center in Pomona, California, part of Pomona Valley Hospital Medical Center. The medical group on file is Parkside Medical Group. Dmand AI also links Dr. Baek to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William S. Baek's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Baek practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Pomona Valley Hospital Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Pomona Valley Hospital Medical Center and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William S. Baek is one of 2,207 neurologists in California
Neurology is Dr. Baek's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Baek is board certified in neurology by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Baek's licenses on file in 3 states: California, Illinois and Pennsylvania.
Specialties and state licenses
- Neurology, CaliforniaPrimary
- Illinois license
- Pennsylvania license
Neurologists near Dr. Baek
Counts of neurologists 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 S. Baek's patients have a median age of 65
Across all payers, Dmand AI patient panel data puts Dr. Baek's median patient age at 65, with 62% women.
Dr. Baek's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women62%
- Men38%
Source: Dmand AI Patient Panel Data
Dr. William S. Baek wrote 3,167 Medicare Part D claims in 2024
In 2024, Dr. Baek wrote 3,167 Medicare Part D claims for 489 patients. 87% of them were for generic drugs. CMS names the drug for 2,871 of them, across 55 drugs with 11 or more claims each, at $1,775,238 in total drug cost. In 2023, CMS named 2,332 claims across 49 drugs.
Dr. Baek's Part D claims by kind of drug, 2024
- Generic2,763 claims87%
- Brand-name and other404 claims13%
Dr. Baek's 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. Baek's Part D claims, 2024
- Antipsychotics, patients 65 and over3%80 of 3,167 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: 2,3322024: 2,87123%
Drugs named by CMS: 55 in 2024, 49 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 S. Baek has 13 publications on record
Dmand AI links 13 papers to Dr. Baek, published from 2008 to 2017. 2012 was the busiest year, with 2. The most frequent topics are Diagnosis, Differential, Electromyography and Fatal Outcome. Dr. Baek's most frequent co-authors are Geoffrey Sheean, Umut Aypar, PhD and Nayan P. Desai, MD.
Dr. Baek's papers by year, 2008 to 2017
Topics Dr. Baek writes about most
- Diagnosis, Differential
- Electromyography
- Fatal Outcome
- Magnetic Resonance Imaging
- Neurologic Examination
Dr. Baek's most frequent co-authors
- Geoffrey Sheean2 shared papers
- Umut Aypar, PhD1 shared paper
- Nayan P. Desai, MD1 shared paper
Recent publications by Dr. Baek
J Plast Reconstr Aesthet Surg
Int J Neurosci
See who Dr. Baek researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Baek works with, so you can find a warm path to the right neurologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. William S. Baek received $66,561 in industry payments from 2016 to 2025
CMS Open Payments shows 752 general payments to Dr. Baek from 53 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 64% of the total. Abbvie Inc. paid the most, $38,588. It also lists 1 research payment totaling $2,029 in 2023.
General payments to Dr. Baek by program year, 2016 to 2025
General payments to Dr. Baek by kind, 2016 to 2025
- Speaker and faculty fees$42,46464%
- Food and beverage$16,37825%
- Consulting fees$5,2378%
- Travel and lodging$1,8363%
- Education$6451%
Companies that paid Dr. Baek the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William S. Baek has 1 award and honors on record
Dmand AI lists 1 award for Dr. Baek, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Baek
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. William S. Baek graduated from Seoul National University College of Medicine
Dr. Baek graduated from Seoul National University College of Medicine in 1999. Dr. Baek is a member of AAN and AANEM.
- Medical school
- Board certified in neurology
Source: Dmand AI Professional Profile Data
Dr. William S. Baek accepts plans from 8 insurance carriers
Dr. Baek is in network with 8 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Elevance
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- Regence Health Plans
- Humana
Plan types Dr. Baek accepts, by number of carriers
- Medicare7
- HMO5
- PPO5
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. William S. Baek'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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 S. Baek
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 S. Baek's NPI number?
Dr. William S. Baek's NPI number is 1326095977. It was assigned on May 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William S. Baek?
Dr. William S. Baek is a neurologist in Pomona, California. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. William S. Baek practice?
Dr. Baek practices at 1798 N Garey Ave, Pomona, CA 91767. Dr. Baek's primary practice is Pomona Valley Hospital Medical Center in Pomona, California, part of Pomona Valley Hospital Medical Center. Dmand AI also links Dr. Baek to 2 group practices and clinics and 1 medical group.
What is Dr. William S. Baek's office phone number?
The practice phone on file for Dr. Baek is (909) 865-9500.
What is Dr. William S. Baek's medical license number?
Dr. Baek holds California license A91283, one of the licenses on file in 3 states.
Which states has Dr. William S. Baek been licensed in?
Dmand AI has state licenses on file for Dr. Baek in California (2005 to 2027), Illinois (2002 to 2005) and Pennsylvania (2001 to 2002).
Which hospitals is Dr. William S. Baek affiliated with?
Dr. Baek practices at Pomona Valley Hospital Medical Center in Pomona, California.
What medical group is Dr. William S. Baek part of?
Dr. Baek is linked to Parkside Medical Group. Dmand AI links Dr. Baek to 1 more medical group.
Is Dr. William S. Baek board certified?
Yes. Dr. Baek is board certified in neurology by the American Board of Psychiatry and Neurology.
Where did Dr. William S. Baek go to medical school?
Dr. Baek graduated from Seoul National University College of Medicine in 1999.
Show 6 more questionsShow fewer questions
What drugs does Dr. William S. Baek prescribe most?
In 2024 Medicare Part D data, Dr. Baek's most prescribed drugs by claims were Donepezil HCl, Carbidopa-Levodopa and Levetiracetam.
Has Dr. William S. Baek received payments from drug or device companies?
CMS Open Payments shows $66,561 in general payments to Dr. Baek from 53 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. William S. Baek been practicing?
Dr. Baek graduated from medical school in 1999, 27 years ago.
Does Dr. William S. Baek do research?
Dmand AI links 13 publications to Dr. Baek, published from 2008 to 2017.
Who does Dr. William S. Baek publish with?
Dr. Baek's most frequent co-authors are Geoffrey Sheean (2 shared papers), Umut Aypar, PhD (1 shared paper) and Nayan P. Desai, MD (1 shared paper).
What insurance does Dr. William S. Baek accept?
Dr. Baek is in network with 8 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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