Dr. Maggie Youngha Ham, MD
- Medicare services, 2016
- 392
- Part D claims, 2024
- 1,841
- Publications
- 3
- Hospital affiliations
- 2
- Industry payments
- $925
- Practice address
- 2300 Wankel Wy, Oxnard, CA 93030
- Practice phone
- Call (805) 485-1908
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Channel Islands Surgicenter
Surgery Center - Medicare-Certified · Oxnard, California
Find Dr. Ham'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. Maggie Youngha Ham is an internist in Oxnard, California
Dr. Ham practices at Channel Islands Surgicenter in Oxnard, California.
Dr. Ham's NPI, 1356581862, was assigned on February 23, 2009. Dr. Ham graduated from David Geffen School of Medicine at UCLA in 2007. Dr. Ham holds California license A106367.
- NPI
- 1356581862NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7416191036
- NPI enumeration date
- February 23, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 485-1908
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Maggie Youngha Ham practices at Channel Islands Surgicenter in Oxnard, California
Dr. Ham's primary practice is Channel Islands Surgicenter, at 2300 Wankel Wy, Oxnard, CA 93030. The practice phone is (805) 485-1908.
- Channel Islands Surgicenter2300 Wankel Wy, Oxnard, CA 93030Phone(805) 485-1908
Source: Dmand AI Affiliation Data
Dr. Maggie Youngha Ham is affiliated with 4 sites of care and 1 medical group
Dr. Ham's primary practice is Channel Islands Surgicenter in Oxnard, California. Dr. Ham is also affiliated with Kaiser Permanente Woodland Hills Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Ham to 1 more hospital and 1 group practice or clinic, 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. Maggie Youngha Ham's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ham practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Channel Islands Surgicenter | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Maggie Youngha Ham is one of 16,751 internists in California
Internal medicine is Dr. Ham's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ham is board certified in gastroenterology by the American Board of Internal Medicine. Dmand AI has Dr. Ham's licenses on file in 3 states: California, Massachusetts and Pennsylvania.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Gastroenterology, Massachusetts
- Pennsylvania license
Internists near Dr. Ham
Counts of internists 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. Maggie Youngha Ham billed Medicare for 392 services in 2016
CMS data shows 392 Medicare services from Dr. Ham across 8 procedure codes in 2016. Medicare paid $36,582 for them.
Dr. Ham's Medicare services by type, 2016
- Office and hospital visits306
- Surgery86
Where Dr. Ham's Medicare services took place, 2016
- In an office27871%
- In a facility11429%
Dr. Ham compared with the California median for internists, 2016
- Dr. Ham
- California median
- Medicare services
- 392vs 3619% above
- Part D claims
- 1,640vs 4213.9 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Ham's most billed Medicare procedure codes, 2016
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Ham?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ham and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Maggie Youngha Ham's patients have a median age of 62
Across all payers, Dmand AI patient panel data puts Dr. Ham's median patient age at 62, with 59% women.
Dr. Ham's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women59%
- Men41%
Source: Dmand AI Patient Panel Data
Dr. Maggie Youngha Ham wrote 1,841 Medicare Part D claims in 2024
In 2024, Dr. Ham wrote 1,841 Medicare Part D claims for 354 patients. 82% of them were for generic drugs. CMS names the drug for 1,640 of them, across 25 drugs with 11 or more claims each, at $372,074 in total drug cost. In 2023, CMS named 1,694 claims across 30 drugs.
Dr. Ham's Part D claims by kind of drug, 2024
- Generic1,511 claims82%
- Brand-name330 claims18%
Dr. Ham'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. Ham's Part D claims, 2024
- Opioids2%28 of 1,841 claims
- Antibiotics3%55 of 1,841 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: 1,6942024: 1,6403%
Drugs named by CMS: 25 in 2024, 30 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
How Dr. Maggie Youngha Ham takes part in Medicare
Dr. Ham accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Maggie Youngha Ham has 3 publications on record
Dmand AI links 3 papers to Dr. Ham, published from 2010 to 2013. 2013 was the busiest year, with 2. Dr. Ham's most frequent co-authors are Adam S. Cheifetz, MD and Daryl T. Lau, MD, MPH.
Dr. Ham's most frequent co-authors
Recent publications by Dr. Ham
See who Dr. Ham researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ham works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Maggie Youngha Ham received $925 in industry payments from 2017 to 2024
CMS Open Payments shows 9 general payments to Dr. Ham from 6 drug and device companies from 2017 to 2024. Food and beverage make up the largest share, 100% of the total. Intercept Pharmaceuticals, Inc. paid the most, $491.
General payments to Dr. Ham by program year, 2017 to 2024
Companies that paid Dr. Ham the most, 2017 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Maggie Youngha Ham graduated from David Geffen School of Medicine at UCLA
Dr. Ham graduated from David Geffen School of Medicine at UCLA in 2007.
- Medical school
- Board certified in gastroenterology
Source: Dmand AI Professional Profile Data
Dr. Maggie Youngha Ham accepts plans from 7 insurance carriers
Dr. Ham is in network with 7 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Kaiser Permanente. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Michigan
- Kaiser Permanente
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
Plan types Dr. Ham accepts, by number of carriers
- Medicare6
- PPO5
- HMO3
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Maggie Youngha Ham'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 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 |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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) |
| 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. Maggie Youngha Ham
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. Maggie Youngha Ham's NPI number?
Dr. Maggie Youngha Ham's NPI number is 1356581862. It was assigned on February 23, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Maggie Youngha Ham?
Dr. Maggie Youngha Ham is an internist in Oxnard, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Maggie Youngha Ham practice?
Dr. Ham practices at 2300 Wankel Wy, Oxnard, CA 93030. Dr. Ham's primary practice is Channel Islands Surgicenter in Oxnard, California. Dmand AI also links Dr. Ham to 1 hospital and 1 group practice or clinic.
What is Dr. Maggie Youngha Ham's office phone number?
The practice phone on file for Dr. Ham is (805) 485-1908.
What is Dr. Maggie Youngha Ham's medical license number?
Dr. Ham holds California license A106367, one of the licenses on file in 3 states.
Which states has Dr. Maggie Youngha Ham been licensed in?
Dmand AI has state licenses on file for Dr. Ham in California (2008 to 2026), Massachusetts (2011 to 2015) and Pennsylvania (2010 to 2011).
Which hospitals is Dr. Maggie Youngha Ham affiliated with?
Dr. Ham is affiliated with Kaiser Permanente Woodland Hills Medical Center. Dmand AI links Dr. Ham to 1 more hospital.
What medical group is Dr. Maggie Youngha Ham part of?
Dr. Ham is linked to Southern California Permanente Medical Group.
Does Dr. Maggie Youngha Ham accept Medicare?
Yes. CMS data shows Dr. Ham billed Medicare for 392 services in 2016, and Dr. Ham accepts Medicare assignment.
Is Dr. Maggie Youngha Ham board certified?
Yes. Dr. Ham is board certified in gastroenterology by the American Board of Internal Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Maggie Youngha Ham bill to Medicare?
In 2016, Dr. Ham's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and office visit, new patient (99204).
Where did Dr. Maggie Youngha Ham go to medical school?
Dr. Ham graduated from David Geffen School of Medicine at UCLA in 2007.
What drugs does Dr. Maggie Youngha Ham prescribe most?
In 2024 Medicare Part D data, Dr. Ham's most prescribed drugs by claims were Pantoprazole Sodium, Lubiprostone and Omeprazole.
Has Dr. Maggie Youngha Ham received payments from drug or device companies?
CMS Open Payments shows $925 in general payments to Dr. Ham from 6 companies from 2017 to 2024. The largest total came from Intercept Pharmaceuticals, Inc.
How long has Dr. Maggie Youngha Ham been practicing?
Dr. Ham graduated from medical school in 2007, 19 years ago.
Does Dr. Maggie Youngha Ham do research?
Dmand AI links 3 publications to Dr. Ham, published from 2010 to 2013.
Who does Dr. Maggie Youngha Ham publish with?
Dr. Ham's most frequent co-authors are Adam S. Cheifetz, MD (1 shared paper) and Daryl T. Lau, MD, MPH (1 shared paper).
What insurance does Dr. Maggie Youngha Ham accept?
Dr. Ham is in network with 7 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Kaiser Permanente. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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