Facial Plast Surg Clin North Am
Botulinum Toxins, Type AFaceNeurotoxins
Dr. Corey S. Maas, MD
NPI1851469282
- Part D claims, 2024
- 85
- Publications
- 72
- Clinical trials
- 8
- Industry payments
- $582,149
- Affiliated sites
- 2
- Practice address
- 2333 Buchanan St, San Francisco, CA 94115
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD
Acute Care Hospital outpatient department · San Francisco, California
Find Dr. Maas' 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. Corey S. Maas is a plastic and reconstructive surgery physician in San Francisco, California
Dr. Maas practices at California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD in San Francisco, California.
Dr. Maas' NPI, 1851469282, was assigned on December 2, 2006. Dr. Maas graduated from University Of Florida College Of Medicine in 1986. Dr. Maas holds California license G71163.
NPI and contact details
- NPI
- 1851469282NPI Registry (opens in a new tab)
- NPI enumeration date
- December 2, 2006
- NPI status
- Active
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Corey S. Maas practices at California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD in San Francisco, California
Dr. Maas' primary practice is California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD, at 2333 Buchanan St, San Francisco, CA 94115.
- California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD2333 Buchanan St, San Francisco, CA 94115
Source: Dmand AI Affiliation Data
Dr. Corey S. Maas is affiliated with 2 sites of care and 1 medical group
Dr. Maas' primary practice is California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD in San Francisco, California. Dmand AI also links Dr. Maas to 1 group practice or clinic and 1 medical group, each named with a free account.
California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPDPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Corey S. Maas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Maas practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Maas practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Corey S. Maas is one of 327 plastics and reconstructive surgery physicians in California
Plastic and reconstructive surgery is Dr. Maas' primary specialty in the NPI Registry, under taxonomy code 2086S0122X. Dr. Maas is board certified in otolaryngology by the American Board of Otolaryngology - Head and Neck Surgery. Dmand AI has Dr. Maas' licenses on file in 5 states: California, Florida, Nevada, Idaho and Illinois.
Specialties and state licenses
- Plastic and reconstructive surgery, CaliforniaPrimary
- Florida license
- Nevada license
- Idaho license
- Illinois license
Plastics and reconstructive surgery physicians near Dr. Maas
Counts of plastics and reconstructive surgery physicians with a Dmand AI profile, by place and practice. Each opens the list.
327plastics and reconstructive surgery physicians in California17plastics and reconstructive surgery physicians in San Francisco
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Corey S. Maas' patients have a median age of 62
Across all payers, Dmand AI patient panel data puts Dr. Maas' median patient age at 62, with 79% women.
Dr. Maas' 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
- Women79%
- Men21%
Source: Dmand AI Patient Panel Data
Dr. Corey S. Maas wrote 85 Medicare Part D claims in 2024
In 2024, Dr. Maas wrote 85 Medicare Part D claims for 29 patients. 94% of them were for generic drugs. CMS names the drug for 54 of them, across 2 drugs with 11 or more claims each, at $560 in total drug cost. In 2023, CMS named 65 claims across 2 drugs.
Part D claims, 202485
Drugs named by CMS2
Total drug cost$560
Part D patients29
Dr. Maas' Part D claims by kind of drug, 2024
- Generic80 claims94%
- Brand-name and other5 claims6%
Dr. Maas' 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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 652024: 5417%
Drugs named by CMS: 2 in 2024, 2 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
For MedTech and pharma teams
Find plastics and reconstructive surgery physicians like Dr. Maas by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Corey S. Maas has 72 publications on record
Dmand AI links 72 papers to Dr. Maas, published from 2009 to 2023. 2011 was the busiest year, with 3. The most frequent topics are Skin Aging, Botulinum Toxins, Type A and Face. Dr. Maas has published most often in Dermatol Surg. Dr. Maas' most frequent co-authors are Joel Lee Cohen, MD, Joel Schlessinger, MD and Joel Cohen, MD.
Papers72
Years published2009 to 2023
Dr. Maas' papers by year, 2009 to 2023
Topics Dr. Maas writes about most
- Skin Aging
- Botulinum Toxins, Type A
- Face
- Neuromuscular Agents
- Cosmetic Techniques
- Biocompatible Materials
- Double-Blind Method
- Esthetics
Dr. Maas' most frequent co-authors
Recent publications by Dr. Maas
Adipose TissueCelluloseCollagen
Biocompatible MaterialsCosmetic TechniquesDermatologic Agents
See who Dr. Maas researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Maas works with, so you can find a warm path to the right plastics and reconstructive surgery physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Corey S. Maas has worked on 8 clinical trials
Dmand AI links Dr. Maas to 8 clinical trials, 3 of them phase 3 studies. Mentor Worldwide, LLC sponsors the most, 3. Open Payments lists research payments to Dr. Maas that name 1 trial.
Clinical trials with Dr. Maas by phase
- NonePhase 1: no trials
- NonePhase 2: no trials
- 3Phase 3: 3 trials
- 2Phase 4: 2 trials
Investigators on the most trials with Dr. Maas
- Leslie S. Baumann, MD2 shared trials
- Daniel Pablo Friedmann, MD1 shared trial
- Shabnam Ghazizadeh, MD1 shared trial
Recent clinical trials with Dr. Maas
Comparison of Escalating Doses of IncobotulinumtoxinA (Xeomin®) in the Treatment of Glabellar Rhytids (opens in a new tab)
Status unknownPhase 4
incobotulinumtoxinA
Ultherapy® treatment
Emervel Deep LidocaineJuvederm Ultra Plus
Onabotulinum Toxin Type A and Abobotulinum Toxin Type A Crow's Feet Rhytid Study (opens in a new tab)
CompletedPhase 4
Left lateral orbital injection of Botox Cosmetic or DysportRight lateral orbital injection of Botox Cosmetic or Dysport
A Long-Term Safety Study of Repeat Treatment With PurTox® for Frown Lines Between the Eyebrows (opens in a new tab)
CompletedPhase 3
Mentor Purified Toxin Botulinum Toxin Type A
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Corey S. Maas received $582,149 in industry payments from 2016 to 2025
CMS Open Payments shows 505 general payments to Dr. Maas from 13 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 46% of the total. Allergan Inc. paid the most, $286,280. It also lists 11 research payments totaling $58,806 from 2016 to 2021, naming 1 clinical trial.
General payments to Dr. Maas by program year, 2016 to 2025
General payments to Dr. Maas by kind, 2016 to 2025
$582.1Kin total
- Consulting fees$267,70846%
- Grants$138,50024%
- Speaker and faculty fees$97,67217%
- Travel and lodging$58,63110%
- Other$19,6383%
Companies that paid Dr. Maas 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. Corey S. Maas has 3 awards and honors on record
Dmand AI lists 3 awards for Dr. Maas, most recently Regional Top Doctor in 2014.
Awards and honors for Dr. Maas
- 2014
- Regional Top Doctor
- Undated
- ACS Fellow
- Super Doc
Source: Dmand AI Professional Profile Data
Dr. Corey S. Maas graduated from University Of Florida College Of Medicine
Dr. Maas graduated from University Of Florida College Of Medicine in 1986. Dr. Maas is a member of ACS.
- Medical school
- Board certified in otolaryngology
Source: Dmand AI Professional Profile Data
Dr. Corey S. Maas accepts plans from 1 insurance carrier
Dr. Maas is in network with 1 carrier, including Aetna. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Aetna
Plan types Dr. Maas accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Corey S. Maas'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 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 |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| 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. Corey S. Maas
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. Corey S. Maas' NPI number?
Dr. Corey S. Maas' NPI number is 1851469282. It was assigned on December 2, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Corey S. Maas?
Dr. Corey S. Maas is a plastic and reconstructive surgery physician in San Francisco, California. The primary specialty in the NPI Registry is Plastic and Reconstructive Surgery Physician (taxonomy code 2086S0122X).
Where does Dr. Corey S. Maas practice?
Dr. Maas practices at 2333 Buchanan St, San Francisco, CA 94115. Dr. Maas' primary practice is California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD in San Francisco, California. Dmand AI also links Dr. Maas to 1 group practice or clinic and 1 medical group.
What is Dr. Corey S. Maas' medical license number?
Dr. Maas holds California license G71163, one of the licenses on file in 5 states.
Which states has Dr. Corey S. Maas been licensed in?
Dmand AI has state licenses on file for Dr. Maas in California (1991 to 2026), Florida (2023 to 2027), Nevada (2023), Idaho (2000 to 2011) and Illinois (1989 to 1990).
Is Dr. Corey S. Maas board certified?
Yes. Dr. Maas is board certified in otolaryngology by the American Board of Otolaryngology - Head and Neck Surgery.
Where did Dr. Corey S. Maas go to medical school?
Dr. Maas graduated from University Of Florida College Of Medicine in 1986.
What drugs does Dr. Corey S. Maas prescribe most?
In 2024 Medicare Part D data, Dr. Maas' most prescribed drugs by claims were Spironolactone and Minoxidil.
Has Dr. Corey S. Maas received payments from drug or device companies?
CMS Open Payments shows $582,149 in general payments to Dr. Maas from 13 companies from 2016 to 2025. The largest total came from Allergan Inc.
How long has Dr. Corey S. Maas been practicing?
Dr. Maas graduated from medical school in 1986, 40 years ago.
Show 3 more questionsShow fewer questions
Does Dr. Corey S. Maas do research?
Dmand AI links 72 publications to Dr. Maas, published from 2009 to 2023. Dr. Maas has worked on 8 clinical trials.
Who does Dr. Corey S. Maas publish with?
Dr. Maas' most frequent co-authors are Joel Lee Cohen, MD (9 shared papers), Joel Schlessinger, MD (5 shared papers) and Joel Cohen, MD (4 shared papers).
What insurance does Dr. Corey S. Maas accept?
Dr. Maas is in network with 1 carrier, including Aetna. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
Selling to plastic and reconstructive surgery practices?
See plastics and reconstructive surgery physicians in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card