Dr. Karissa C. Hammer, MD
- Publications
- 13
- Industry payments
- $371
- Affiliated sites
- 1
- Medical group
- 1
- State licenses
- 2
- Practice address
- 680 N Lake Shore Dr - Ste 117, Chicago, IL 60611
- Practice phone
- Call (312) 288-6420
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Surgical Center for Human Reproduction
Clinical Lab - Basic Testing Only · Chicago, Illinois
Find Dr. Hammer'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. Karissa C. Hammer is an OB-GYN in Chicago, Illinois
Dr. Hammer practices at Surgical Center for Human Reproduction in Chicago, Illinois.
Dr. Hammer's NPI, 1801277736, was assigned on June 16, 2015. Dr. Hammer holds Massachusetts license 278746.
- NPI
- 1801277736NPI Registry (opens in a new tab)
- NPI enumeration date
- June 16, 2015
- NPI status
- Active
- Practice phone
- (312) 288-6420
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Karissa C. Hammer practices at Surgical Center for Human Reproduction in Chicago, Illinois
Dr. Hammer's primary practice is Surgical Center for Human Reproduction, at 680 N Lake Shore Dr - Ste 117, Chicago, IL 60611. The practice phone is (312) 288-6420.
- Surgical Center for Human Reproduction680 N Lake Shore Dr - Ste 117, Chicago, IL 60611Phone(312) 288-6420
Source: Dmand AI Affiliation Data
Dr. Karissa C. Hammer is affiliated with 1 site of care and 1 medical group
Dr. Hammer's primary practice is Surgical Center for Human Reproduction in Chicago, Illinois. Dmand AI also links Dr. Hammer to 1 medical group, named with a free account. Dr. Hammer's employer is on file too: a clinical lab.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Karissa C. Hammer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hammer practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Surgical Center for Human Reproduction | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Karissa C. Hammer is one of 1,665 OB-GYNs in Illinois
Obstetrics and gynecology is Dr. Hammer's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dmand AI has Dr. Hammer's licenses on file in 2 states: Massachusetts and Illinois.
Specialties and state licenses
- Obstetrics and gynecology, MassachusettsPrimary
- Illinois license
OB-GYNs near Dr. Hammer
Counts of OB-GYNs 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. Karissa C. Hammer's patients have a median age of 37
Across all payers, Dmand AI patient panel data puts Dr. Hammer's median patient age at 37, with 91% women.
Dr. Hammer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 37
Patient panel by sex, all payers
- Women91%
- Men8%
Source: Dmand AI Patient Panel Data
Dr. Karissa C. Hammer has 13 publications on record
Dmand AI links 13 papers to Dr. Hammer, published from 2019 to 2024. 2022 was the busiest year, with 5. The most frequent topics are Infertility, Pregnancy Rate and Blastocyst. Dr. Hammer has published most often in J Assist Reprod Genet. Dr. Hammer's most frequent co-authors are Irene C. Souter, MD, Caitlin Redd Sacha, MD and Victoria W. Fitz, MD.
Dr. Hammer's papers by year, 2019 to 2024
Topics Dr. Hammer writes about most
- Infertility
- Pregnancy Rate
- Blastocyst
- COVID-19
- Embryo Transfer
- Fertilization in Vitro
- Insemination
- Pregnancy Outcome
Dr. Hammer's most frequent co-authors
- Irene C. Souter, MD7 shared papers
- Caitlin Redd Sacha, MD5 shared papers
- Victoria W. Fitz, MD4 shared papers
Recent publications by Dr. Hammer
J Assist Reprod Genet
J Assist Reprod Genet
J Assist Reprod Genet
See who Dr. Hammer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hammer works with, so you can find a warm path to the right OB-GYNs.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Karissa C. Hammer received $371 in industry payments from 2017 to 2025
CMS Open Payments shows 9 general payments to Dr. Hammer from 5 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 94% of the total. Ferring Pharmaceuticals Inc. paid the most, $137.
General payments to Dr. Hammer by program year, 2017 to 2025
General payments to Dr. Hammer by kind, 2017 to 2025
- Food and beverage$34894%
- Education$236%
Companies that paid Dr. Hammer the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Karissa C. Hammer'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 |
| 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) |
| 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. Karissa C. Hammer
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. Karissa C. Hammer's NPI number?
Dr. Karissa C. Hammer's NPI number is 1801277736. It was assigned on June 16, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Karissa C. Hammer?
Dr. Karissa C. Hammer is an OB-GYN in Chicago, Illinois. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Karissa C. Hammer practice?
Dr. Hammer practices at 680 N Lake Shore Dr - Ste 117, Chicago, IL 60611. Dr. Hammer's primary practice is Surgical Center for Human Reproduction in Chicago, Illinois. Dmand AI also links Dr. Hammer to 1 medical group.
What is Dr. Karissa C. Hammer's office phone number?
The practice phone on file for Dr. Hammer is (312) 288-6420.
What is Dr. Karissa C. Hammer's medical license number?
Dr. Hammer holds Massachusetts license 278746, one of the licenses on file in 2 states.
Which states has Dr. Karissa C. Hammer been licensed in?
Dmand AI has state licenses on file for Dr. Hammer in Massachusetts and Illinois.
Has Dr. Karissa C. Hammer received payments from drug or device companies?
CMS Open Payments shows $371 in general payments to Dr. Hammer from 5 companies from 2017 to 2025. The largest total came from Ferring Pharmaceuticals Inc.
How long has Dr. Karissa C. Hammer been practicing?
Dr. Hammer's NPI was assigned in 2015.
Does Dr. Karissa C. Hammer do research?
Dmand AI links 13 publications to Dr. Hammer, published from 2019 to 2024.
Who does Dr. Karissa C. Hammer publish with?
Dr. Hammer's most frequent co-authors are Irene C. Souter, MD (7 shared papers), Caitlin Redd Sacha, MD (5 shared papers) and Victoria W. Fitz, MD (4 shared papers).
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