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Edit this profileAt a glance
- 840 S Waukegan Rd Ste 208, Lake Forest, IL 60045
About Dr. Mass
Karen J. Mass, MD is a healthcare provider in Lake Forest, IL specializing in obstetrics & gynecology. Karen trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb), graduating in 1988. Medicare claims data shows Karen provided 1,553 services to 1,451 patients. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, pelvic exam, and screening mammography. This provider record is associated with NPI 1710179759.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (847) 295-0433
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
840 S WAUKEGAN RD STE 208
Lake Forest, IL 60045
Conditions Commonly Evaluated or Treated
Within Obstetrics and Gynecology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Contraception
Fertility
High-risk or subspecialty
Infections
Pelvic pain and benign gynecology
- Uterine fibroids
- Chronic pelvic pain
- Ovarian cysts
- Painful intercourse
- Pelvic organ prolapse
- Urinary incontinence in women
Most searched conditions
Infections and vulvovaginal conditions
Menstrual and hormonal
- Absent periods
- Genitourinary syndrome of menopause
- Painful periods
- Perimenopause
- Premenstrual syndrome
Pregnancy
- Ectopic pregnancy
- Gestational diabetes
- Hyperemesis gravidarum
- Miscarriage
- Placenta previa
- Postpartum depression
- Preeclampsia
- Preterm labor
Cancer and precancer
- Abnormal cervical cells and cervical dysplasia
- Cervical cancer
- Endometrial cancer
- Endometrial hyperplasia
- Ovarian cancer
Pregnancy Complications
Vaginal & Vulvar Health
Procedures & services
Diagnostic Tests
Hormone & Menopause
Laparoscopic and adnexal surgery
Pelvic floor
Pregnancy and delivery
Preventive and diagnostic
- Pelvic examination
- Transvaginal ultrasound
- Well-woman examination
- Colposcopy
- Endometrial biopsy
- Human papillomavirus testing
Subspecialty procedures
Surgeries
Most searched procedures
Contraception and office treatment
Birth Control
Contraception
Diagnostic Procedures
- Amniocentesis
Fertility
- Egg freezing
- Intrauterine Insemination (IUI)
Postpartum Care
Pregnancy & Prenatal
Preventive Care
Preventive Screening
Routine Exams
Uterine and cervical procedures
Procedures Most Often Billed to Medicare
1,553 services · 1,451 patients · 17 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Screening mammography | Imaging | 77067 |
167 | More than most peers in OB-GYN |
| Screening 3d breast mammography | Imaging | 77063 |
167 | More than most peers in OB-GYN |
| Dxa bone density measurement of hip, pelvis, spine | Imaging | 77080 |
87 | More often than most peers in OB-GYN |
| Calculation of trabecular bone score (tbs) using imaging data with interpretation and report on fracture risk | Imaging | 77089 |
83 | Too few peers to compare |
| Complete ultrasound scan of 1 breast | Imaging | 76641 |
36 | More often than most peers in OB-GYN |
| Complete ultrasound scan of pelvis | Imaging | 76856 |
19 | As often as other peers in OB-GYN |
| Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina | Imaging | 76830 |
16 | Less often than most peers in OB-GYN |
| Limited ultrasound scan of 1 breast | Imaging | 76642 |
14 | Less often than most peers in OB-GYN |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
254 | More than most peers in OB-GYN |
| Pelvic exam | Office visit | 99459 |
244 | More than most peers in OB-GYN |
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 OB-GYNs in Lake Forest 8
Same specialty, same city.
Trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 1988 at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) 8
Providers who graduated from the same medical school in the same year.
Also performs Screening mammography 8
Providers in IL who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Mass?
Dr. Mass is an OB-GYN in Lake Forest, IL. That is the designation recorded for this NPI in the federal registry, where it is listed as “Obstetrics & Gynecology”.
NPI registry
What is Dr. Mass's address?
Dr. Mass is listed at 840 S Waukegan Rd Ste 208, Lake Forest, IL 60045. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Mass?
The number on file is (847) 295-0433. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Mass?
Dr. Mass's National Provider Identifier is 1710179759. 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. Mass train?
Dr. Mass attended University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb), graduating in 1988. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Mass have?
Dr. Mass has 38 years experience. Calculated from a graduation year of 1988, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Mass perform?
According to Medicare billing data, Dr. Mass performs imaging including screening mammography and screening 3d breast mammography, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Mass's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Mass. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.